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Team develops electroplating method for Li-ion cathode production; high performance and new form factors, functionalities

13 May 2017

Researchers at the University of Illinois, Xerion Advanced Battery Corporation and Nanjing University in China have developed a method for electroplating lithium-ion battery cathodes, yielding high-quality, high-performance battery materials that could also enable flexible and solid-state batteries.

In an open-access paper in the journal Science Advances, the team reports using a low-temperature (260 °C) molten salt electrodeposition approach directly to electroplate the Li-ion cathode materials layered LiCoO2, spinel LiMn2O4, and Al-doped LiCoO2. The crystallinities and electrochemical capacities of the electroplated oxides are comparable to those of the powders synthesized at much higher temperatures (700° to 1000°C). The researchers said that the new growth method significantly broadens the scope of battery form factors and functionalities, enabling a variety of highly desirable battery properties, including high energy, high power, and unprecedented electrode flexibility.

F1.large
Schematic illustration of electrodeposition process. Zhang et al. Click to enlarge.

Lithium transition metal oxides (LTMOs), which are typically synthesized in powder form via solid-state reactions at 700° to 1000°C, are nearly universally applied as cathode materials in Li-ion batteries. Because the current collector substrates used for Li-ion battery electrodes degrade at the LTMO synthesis temperatures, cathodes are made by slurry-casting the presynthesized LTMO powder onto either metal foils for conventional batteries or porous scaffolds (for example, fiber mats and open-cell foams) for emerging three-dimensional (3D) and flexible battery designs. However, the electrochemical and mechanical properties of slurry-cast electrodes are often limited by weak interconnections between particles and between the particles and the substrate. We suggest that conformal electrodeposition of high-quality LTMOs would provide opportunities to enhance battery performance (energy density, power density, and flexibility) and broaden the scope of available electrode form factors (size, shape, porosity, and 3D integration).

—Zhang et al.

The method is compatible with a variety of conventional and mesostructured current collectors, and provides opportunities to realize new electrode architectures and functionalities. Among the benefits is obviating the need for binders.

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An electron micrograph cross-section shows aluminum foil plated with lithium cobalt oxide, a common material in lithium-ion batteries. Image courtesy of Hailong Ning and Jerome Davis III, Xerion Advanced Battery Corp. Click to enlarge.

Traditional lithium-ion battery cathodes use lithium-containing powders formed at high temperatures and mixed with gluelike binders and other additives into a slurry, which is spread on a thin sheet of aluminum foil and dried. The glue is inactive; i.e., it doesn’t contribute anything to the battery, and it gets in the way of electricity flowing in the battery, said co-author Hailong Ning, the director of research and development at Xerion Advanced Battery Corporation. Xerion is a startup company co-founded by Paul V. Braun, a professor of materials science and engineering and director of the Frederick Seitz Materials Research Lab at Illinois, who led the research group.

You have all this inactive material taking up space inside the battery, while the whole world is trying to get more energy and power from the battery.

—Hailong Ning

The team demonstrated that a ~25-μm-thick, ~80% dense LiCoO2 film can be directly electroplated on an Al foil, and the resultant full cell can deliver high-rate discharge up to at least 20 C.right side of this quarter was plated with lithium cobalt oxide.

The electroplated cathode can pack in 30% more energy than a conventional cathode, according to the paper. It can charge and discharge faster as well, since the current can pass directly through it and not have to navigate around the inactive glue or through the slurry’s porous structure. It also has the advantage of being more stable.

Additionally, the electroplating process creates pure cathode materials, even from impure starting ingredients. This means that manufacturers can use materials lower in cost and quality and the end product will still be high in performance, eliminating the need to start with expensive materials already brought up to battery grade, Braun said.

This method opens the door to flexible and three-dimensional battery cathodes, since electroplating involves dipping the substrate in a liquid bath to coat it.

—lead author Huigang Zhang, a former senior scientist at Xerion who is now a professor at Nanjing University

The Us Department of Energy Office of Science supported this work at the U. of I. Materials science and engineering professor Jian-Min Zuo also was part of the Illinois team.

Resources

  • Huigang Zhang, Hailong Ning, John Busbee, Zihan Shen, Chadd Kiggins, Yuyan Hua, Janna Eaves, Jerome Davis Iii, Tan Shi, Yu-Tsun Shao, Jian-Min Zuo, Xuhao Hong, Yanbin Chan, Shuangbao Wang, Peng Wang, Pengcheng Sun, Sheng Xu, Jinyun Liu, Paul V. Braun (2017) “Electroplating lithium transition metal oxides” Science Advances Vol. 3, no. 5, e1602427 doi: 10.1126/sciadv.1602427

May 13, 2017 in Batteries, Manufacturing | Permalink | Comments (11)

Comments

Listen everybody, this is a lie. If it were true we will have now a 800 miles battery at low cost with long durability and ultra fast charge capability. They just lie on a daily basis to grab ton of state subsidies worldwide, even the poors pay money toward these crooked scientific scammers with ultra big paychecks. thus you have to buy the cheapest gas car and keep it a very long time. All the crooked politicians like justin trudeau and Obama and Clinton is diverting billions toward these liars. Even car racing is now subsidized by tax money.

gorr,
Take a hike, you are not adding anything at all.

@SJC: I agree that gorr contributes little but negativity toward innovation and progress, but there is nothing we can do.


He's kind of like President Trump in that regard.

If you get 30% better energy density (by volume or by weight) from a cathode, what does that do to the battery as a whole.
Also, will it cost more ?

30% would certainly be nice...

Jatco,
Sure there is, tell him to go away and if he does not everyone report him to get him banned.

I don't know enough about the "Report" function on TypePad. I'll have to do some research and see how to do that.

Thanks!

You just email the people who run this site.

Battery Tech Research is really heating up as the transportation sector sees the need to move away from fossil fuels and the electric utilities have found that battery storage can solve their duck curve problems more economically than using natural gas peaker plants..

Electricity production and consomption could be better matched with more selected H2 (electrolyser) stations and more BEV (batteries) selected charging facilities.

Perfect match will be difficult. Large H2-FCs and/or large battery banks may be required to fill peak demands.

I'd just use gas turbines for large scale outages and batteries for load shaping to smooth the switchover from renewables to dispatchable sources.

What is the difference with a traditional micro battery ?

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