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Hitachi Doubles Life of Industrial Li-ion Batteries with Manganese-Based Cathode Materials

Hitachi has developed a new cathode material for industrial lithium-ion batteries using manganese-based cathode materials that roughly doubles the life of similar batteries using the cathode material which was developed by Hitachi in the past.

Lithium-ion batteries using the newly developed cathode material are expected to be used for electrical power storage in wind power generation and other new energy fields, and as industrial power sources for electric-powered construction machinery designed to reduce greenhouse gas emissions. (Earlier post.)

The high operating voltage of manganese spinel cathode materials makes this material suitable for power storage applications; however, deterioration of battery capacity over numerous charge and discharge cycles is an issue.

The newly developed cathode material stabilizes the crystal structure by replacing some of the manganese in the cathode material with other elements, and at the same time includes composite oxides with outstanding resistance to acids, to minimize the elution of manganese into the liquid electrolyte. Hitachi has already developed and evaluated prototype cells using the new cathode material, and has confirmed that reductions in battery capacity can be roughly cut in half compared to existing units.

Using the new material, Hitachi thus expects to be able to achieve battery life of ten years or more, which is about twice the life of current lithium-ion batteries with manganese-based cathode materials.

These results were achieved as part of an ongoing project contracted by the New Energy and Industrial Technology Development Organization (NEDO) to Hitachi under the title “Development of elemental technologies for power storage systems to achieve smooth utility interactions.” The prototype cell was developed in collaboration with Shin-Kobe Electric Machinery Co., Ltd.

Comments

Arne

I wonder why they propose to use Li Ion in large scale stationary applications. Wouldn't flow batteries be a much cheaper option? A few 100 $ per kWh just seems too expensive to me.

HarveyD

Anne:

Those batteries could be used in large e-vehicles and cars in the not too distant future for 10+ years service life.

Mannstein

The vanadium electrolyte in flow batteries isn't cheap. The batteries also require a large physical plant because of low energy density.

One advantage is long cycle life. Some batteries have survived 13,000 charge discharge cycles.

DaveD

I know a couple of guys who are claiming they have some patents on vanadium batteries and that it is the "next big thing". I like them, but they strike me more as the mad scientist type. How realistic is the whole vanadium battery approach to long storage and load leveling for the power industry?

mds

Is there any measured data on the expected deep cycle life of these batteries? Description is only in very general terms.

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