OXIS Energy has successfully tested its Lithium-sulfur (Li-S) battery cell prototypes at 471Wh/kg and is confident of achieving 500Wh/kg in the next 12 months. Consistently shipping cells at 400Wh/kg to its clients in Europe, the US and Japan, OXIS is collaborating with major European chemical partners to develop an advanced... Read more →

Researchers at the Hong Kong University of Science and Technology have developed a high-capacity, long-life lithium-sulfur battery using a bi-functional cathode substrate for Li–S batteries made of well-distributed boron carbide nanoparticles decorated activated cotton fiber (B4C-ACF). Long-term cycling test results of Li–S battery with S/B4C-ACF electrode at 1 C. Zhang... Read more →

Researchers at IBM and Daimler AG have used a quantum computer to model the dipole moment of three lithium-containing molecules, with an eye on moving closer to next-generation lithium sulfur (Li-S) batteries. In a research paper published on arXiv.org, the researchers report simulating the ground state energies and the dipole... Read more →

An international team of researchers led by Monash University has developed an ultra-high capacity Li-S battery that has better performance and less environmental impact than current lithium-ion products. An open-access paper on their work is published in Science Advances. Lithium-sulfur batteries can displace lithium-ion by delivering higher specific energy. Presently,... Read more →

A team at the University of Manchester (UK) has developed a doped graphene cathode for highly stable lithium-sulfur batteries. In an open access paper in the Nature journal Communications Chemistry, they report 100% charge capacity of Li-S batteries using the cathode material with 500 charge/discharge cycles at 0.5 C, 1... Read more →

Researchers at Zhengzhou University, Tsinghua University and Stanford University have developed a solid-electrolyte-based liquid Li-S and Li-Se (SELL-S and SELL-Se, respectively) battery system with the potential to deliver energy densities exceeding 500 Wh kg-1 and and 1,000 Wh L-1, together with the ability of low-cost and stable electrochemical performance for... Read more →

To develop higher capacity batteries, researchers have looked to lithium-sulfur batteries because of sulfur’s high theoretical capacity and energy density. There are still several problems to solve before lithium-sulfur batteries can be put into widespread practical application—such as sulfur’s intrinsically low electrical conductivity and the rapid capacity decay caused by... Read more →

Researchers at Chalmers University of Technology (Sweden) with colleagues at Gyeongsang National University (Korea) have used an ionic liquid (Py1,4TFSI) as an electrolyte additive to enable longer cycle-life of Li/S batteries. By tuning the concentration of the ionic liquid (IL), they demonstrated an enhanced stability of the SEI and lower... Read more →

A team of researchers from China and Germany have used azulene—a benzene-free and vinyl-free molecule—to polymerize with sulfur to create a cathode material for Li-S batteries. As described in an open-access paper in the RSC journal Chemical Communications,the polymer exhibits high sulfur content and offers longer lifetime stability compared to... Read more →

OXIS Energy will establish the first manufacturing plant for the production of electrolyte and cathode active material specifically for the mass production of lithium sulfur cells. The plant will be built at the Kenfig Industrial Estate Port Talbot in Wales. OXIS has signed a 15-year lease with United UK Real... Read more →

Researchers at Beihang University in Beijing have developed a linear molecule sulfur-rich organic material as sulfur cathode for a lithium-sulfur battery. The tetramethylthiuram disulfide-sulfur (TMTD-S) cathode material delivers an initial capacity of 685 mAh g−1 at 0.2C (1 C = 1061 mAh g−1) and maintains the capacity at 540 mAh g−1 after 200 cycles. Furthermore, when... Read more →

Researchers at Chalmers University of Technology, Sweden, have developed a free-standing reduced graphene oxide (r-GO) aerogel for use as a supporting electrode for the electrochemical redox reaction of sulfur in a catholyte-based lithium-sulfur battery. A mesoporous matrix is formed by a layers of r-GO, providing sites for electrochemical reactions and... Read more →

Researchers at MIT and in China are proposing a new class of dense intercalation-conversion hybrid cathodes by combining intercalation-type Mo6S8 with conversion-type sulfur (HMSC) to realize a Li–S full cell. In a paper in Nature Energy, the researchers report that the mechanically hard Mo6S8 with fast Li-ion transport ability, high... Read more →

PolyPlus Battery Company a privately-held company focused on the development of the first rechargeable Li metal battery with a ionically conductive glass separator, has entered into the first stage of a joint development agreement with SK Innovation Co. Ltd., Korea’s first and largest energy and chemical company. SK selected PolyPlus... Read more →

OXIS Energy Ltd UK has signed a contract with CODEMGE PARTICIPACOES SA, a public company incorporated in the city of Belo Horizonte in the state of Minas Gerais, Brazil, to establish the world’s first digital manufacturing plant for the mass production of OXIS’ lithium-sulfur cells. OXIS Energy Brazil Holdings will... Read more →

A KAIST research team has developed ultra-stable, high-rate lithium-sulfur batteries (LSBs) by using hierarchically porous titanium nitride (h-TiN) as a sulfur host. In a paper in the journal Advanced Materials, the researchers report that h-TiN/S shows a reversible capacity of 557 mAh g−1 even after 1000 cycles at 5 C... Read more →

Safran acquired an equity interest in Li-Sulfur battery manufacturer OXIS Energy (earlier post) through its Safran Corporate Ventures subsidiary, which invests in disruptive technology businesses. OXIS Energy, a leader in lithium-sulfur cell technology for high energy density battery systems, has already been granted 173 patents with 96 pending. Benefiting from... Read more →

Researchers from Tsinghua University and China University of Geosciences have used an ultrathin indium sheet to construct a stabilized lithium-rich hybrid anode with fast interfacial ion transport. The artificial alloy layer demonstrates an enhanced ionic conductivity with an order of magnitude higher than that of the pristine solid electrolyte interphase.... Read more →

Researchers at Jiangsu Normal University in China have devised a boron-doped carbon-sulfur (BCS) aerogel with consecutive “core-shell” stuctures as a binder-free cathode for lithium-sulfur batteries. In an open-access paper in the RSC journal Chemical Communications, they report achieving a high specific capacity of 1326 mAh/g, long cycling lifespan and a... Read more →

A team of researchers in China has devised a simple and mass-produceable method to modify a Li metal anode to avoid the formation of an unstable solid electrolyte interphase (SEI) and the subsequent growth of Li dendrites in high-energy-density Li-S batteries. A paper on their work is published in the... Read more →

The €7.9-million (US$8.9-million), 43-month Lithium Sulfur for Safe Road Electrification (LISA) project will launch 1 January 2019 in Europe. The overall goal is to design and manufacture a lithium-sulfur technology that will enable safe electrification of EV applications. The partners involved in the LISA project are LEITAT (co-ordinators), OXIS Energy... Read more →

Lithium-chalcogen batteries—e.g., lithium-sulfur (Li-S) and lithium selenium (Li-Se) systems— are promising candidates for high energy electrical storage solution. Earlier this year, a team of researchers at the General Motors Research and Development Center in Warren, MI, with colleagues at Optimal CAE and Pacific Northwest National Laboratory (PNNL), reported demonstrating a... Read more →

Researchers at the University of Texas at Austin are proposing a novel approach to suppress the “polysulfide shuttle” in Li-S batteries—a freestanding, three-dimensional graphene/1T MoS2 (3DG/TM) heterostructure with highly efficient electrocatalysis for lithium polysulfides (LiPSs). Cells with 3DG/TM exhibit outstanding electrochemical performance, with a high reversible discharge capacity of 1181... Read more →

Researchers from Western University, Canadian Light Source, and the Chinese Academy of Sciences have proposed a novel solid-phase Li-S transformation mechanism that enables high energy Li-S batteries in conventional Li-ion carbonate electrolytes. An open-access paper on their work is published in Nature Communications. Schematic of a lithium sulfur battery in... Read more →

Researchers at Shanghai Jiao Tong University have developed a gel-like electrolyte induced by fumed alumina for dendrite-free Li deposition, lower over-potential and better cycle stability in lithium-sulfur batteries. An open-access paper on their work is published in the RSC journal Chemical Communications. The Li-S@pPAN cells with the proposed electrolyte exhibit... Read more →

Lithium-sulfur (Li-S) batteries, despite their high theoretical specific energy, face practical challenges including polysulfide shuttling and low cell-level energy density. Researchers at the University of Waterloo have now shown that the lightweight superconductor MgB2 (magnesium diboride)—the average mass/atom of which is comparable with carbon—as a metallic sulfur host fulfills both... Read more →

The Rice University lab of chemist James Tour has shown that thin nanotube films effectively stop dendrites that grow naturally from unprotected lithium metal anodes in batteries. A paper on their work is published in the journal Advanced Materials. Here, it is shown that lithiated multiwall carbon nanotubes (Li‐MWCNTs) act... Read more →

Researchers in Drexel’s College of Engineering report the ability of stabilized titanium monoxide (TiO) nanoparticles in nanofibers to support high conductivity and to bind polysulfides in Li-S batteries. Their paper is published in the ACS journal Applied Materials & Interfaces. The developed 3-D TiO/CNF architecture with the inherent inter-fiber macropores... Read more →

Researchers at Changchun University of Science and Technology in China have developed a nanobox strategy to improve the performance of lithium-sulfur batteries. A paper on their work appears in the Journal of Power Sources. Li–S batteries theoretically offer a specific energy density of 2600 Wh kg−1—five times than the commercial... Read more →

OXIS Energy UK has achieved 425 Wh/kg on a High Energy 16Ah pouch Lithium Sulfur (Li-S) cell design for HAPS applications (High Altitude Pseudo Satellites) and expects to achieve 450Wh/kg at cell level by the end of 2018. OXIS aims to reach 500Wh/kg by the end of 2019 through its... Read more →

Although rechargeable lithium–sulfur (Li–S) batteries promise high energy density storage—particularly attractive for electric vehicle applications—the technology is currently limited by the shuttling polysulfides between the battery’s electrodes. Polysulfides deteriorate the lithium side of the battery and reduce its ability to hold charge. Now, Mohamed Alkordi at Zewail City of Science... Read more →

A team of researchers from institutions in China and the US report the design of a negatively charged graphene composite separator for the effective suppression of the polysulfide shuttling effect in Li-sulfur batteries. The negatively charged 3D porous structure effectively inhibits the translocation of negatively charged polysulfide ions to enable... Read more →

Although Li metal anode are a promising enabler for high-energy-density next-generation battery systems, practical applications are severely hindered by low efficiency and potential safety hazards, largely due to the high reactivity of metallic Li toward liquid electrolytes. Now, a team of researchers at Stanford University has demonstrated the use of... Read more →

Purdue engineers have used upcycled low-density polyethylene (LDPE) plastic to boost the lifespan of lithium-sulfur batteries. They first prepared porous sulfonated carbon (PSC) from LDPE plastic via microwave-promoted sulfonation. The microwave process not only boosts the sulfonation reaction of LDPE but also induces huge amounts of pores within the sulfonated... Read more →

The “classic” high-energy capacity Lithium-sulfur battery is predicated on the use of a sulfur-based cathode and a Lithium-metal anode. Among the issues hampering the commercialization of this attractive technology are the safety and performance issues associated with the use of the lithium-metal anode. Accordingly, a number of different approaches have... Read more →

Researchers at Tsinghua University in China have used ultrathin and lightweight molybdenum sulfide (MoS2)/carbon nanotube (CNT) interlayers to trap polysulfides in high-performance lithium–sulfur (Li–S) batteries. A paper on their work is published in the Journal of Power Sources. An electrode with the MoS2/CNT interlayer delivers an attractive specific capacity of... Read more →

Lignosulfonate, a sulfonated carbon waste material, is a major by-product in the papermaking industry. Researchers at Rensselaer Polytechnic Institute (RPI) have now developed a method to use this cheap and abundant waste byproduct to build a components for lithium-sulfur batteries. Reported in an open-access paper published in the RSC journal... Read more →

Researchers at The University of Texas at Dallas have used two-dimensional (2D) MoS2 (molybdenum disulfide) as a protective layer for Li-metal anodes, greatly improving the performances of Li–S batteries. In a paper in the journal Nature Nanotechnology, the researchers report that such a use of MoS2 results in stable Li... Read more →

Dendritic growth of lithium (Li) on lithium metal anodes has hobbled the practical application of Li-metal batteries, despite their theoretical benefits such as high capacity and low redox potential. Now, researchers at the University of Illinois at Chicago, with colleagues at Texas A&M University, have used a 3D conformal graphene... Read more →

Lithium-metal batteries are among the most promising candidates for high-density energy storage technology, but uncontrolled lithium dendrite growth, which results in poor recharging capability and safety hazards, currently is hindering their commercial potential. Now, researchers at Arizona State University, with colleagues at Rice University, have used a 3-dimensional layer of... Read more →

Aerotec, a Brazilian Private Equity fund, will invest £3.75 million (US$5.2 million) in Li-Sulfur battery company OXIS Energy. The investment is Aerotec’s first international venture. Established in 2005, OXIS Energy has developed, and continues to advance, an innovative Lithium Sulfur (Li-S) battery chemistry. With considerably higher energy density, OXIS’ batteries... Read more →

Researchers from Shinshu University in Japan have developed a method to suppress the growth of lithium dendrites in Li-S and Li-air batteries. As reported in a paper in the RSC journal Physical Chemistry Chemical Physics, they used magnesium bis(trifluoromethanesulfonyl)amide [Mg(TFSA)2] as an electrolyte additive to suppress the growth of Li... Read more →

Boeing has invested in Berkeley, Calif.-based Cuberg, Inc., a startup founded by former Stanford University researchers developing next-generation battery technology for potential aerospace and industrial applications. Cuberg developed an advanced lithium metal rechargeable battery cell that is designed to be a drop-in solution to existing large-scale battery manufacturing processes. It... Read more →

Lithium metal—with its high theoretical capcity and low electrochemical potential—is an ideal anode for Li-ion batteries, and is the material of choice for advanced batteries such as Li-sulfur and Li-O2. However, dendritic growth on the anode leads to an unstable solid electrolyte interphase, volume fluctuation, and even shorting of the... Read more →

A team of researchers led by scientists at the US Department of Energy’s Lawrence Berkeley National Laboratory (Berkeley Lab) have designed an active polyelectrolyte binder (PEB) that actively regulates key ion transport processes within a lithium-sulfur battery, and have also shown how it functions on a molecular level. The new... Read more →

Researchers in China are proposing a new strategy to retard dendrite formation on Li metal anodes in high-capacity Li-ion batteries. In a paper published in the ACS journal Nano Letters, they describe trapping Li within hollow silica microspheres with a carbon nanotube core to suppress dendrite growth. Such an electrode... Read more →

Researchers at the University of California, Riverside’s Bourns College of Engineering have developed a technique to create high performance lithium-ion batteries utilizing sulfur and silicon electrodes. Reported in an open-access paper in the journal Scientific Reports, this sulfur-silicon full cell (SSFC) battery architecture gradually integrates controlled amounts of pure lithium... Read more →

Researchers at the University of Waterloo (Canada) have developed a low-cost and scalable approach that tackles the stabilization of Li metal electrodes by forming a single-ion-conducting and stable protective surface layer in vivo. They use a rationally designed electrolyte additive complex that reacts with the Li surface to form the... Read more →

A team in China has used graphene microsheets (GMs)—prepared from microcrystalline graphite minerals by an electrochemical & mechanical approach—as a special conductive support for sulfur for the cathode of a lithium-sulfur battery. The graphene microsheets feature excellent conductivity and low-defect, small sheet sizes of <1 μm2 and ≤ 6 atomic... Read more →

Rice University team finds asphalt-lithium metal anode enables faster charging, resistance to dendrite formation; Li-S test cell The Rice lab of chemist James Tour has developed anodes comprising porous carbon made from asphalt that showed exceptional stability after more than 500 charge-discharge cycles. A high-current density of 20 milliamps per... Read more →