期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 133, 期 51, 页码 20692-20695出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja208880f
关键词
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资金
- U.S. Department of Energy, Office of Basic Energy Sciences [DE-AC02-98CH10886]
- Brookhaven National Laboratory
- Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Vehicle Technologies, under the Vehicle Technology Program
Many researchers have focused in recent years on resolving the crucial problem of capacity fading in Li ion batteries when carbon anodes are replaced by other group-IV elements (Si, Ge, Sn) with much higher capacities. Some progress was achieved by using different nanostructures (mainly carbon coatings), with which the cycle numbers reached 100-200. However, obtaining longer stability via a simple process remains challenging. Here we demonstrate that a nanostructure of amorphous hierarchical porous GeOx whose primary particles are similar to 3.7 nm diameter has a very stable capacity of similar to 1250 mA h g(-1) for 600 cycles. Furthermore, we show that a full cell coupled with a Li(NiCoMn)(1/3)O-2 cathode exhibits high performance.
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