Journal
ADVANCED MATERIALS
Volume 32, Issue 49, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202004898
Keywords
cathode; electrolyte interphases; ether electrolytes; high‐ voltage LiCoO2; lithium metal batteries
Categories
Funding
- Vehicle Technologies Office of the U.S. Department of Energy (DOE) through the Advanced Battery Materials Research (BMR) program (Battery500 Consortium) [DE-AC05-76RL01830, DE-SC0012704]
- Office of Biological and Environmental Research at PNNL [grid. 436923.9]
- DOE [DE-AC05-76RL01830]
- DOE Office of Science [DE-SC0012704]
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High-energy-density batteries with a LiCoO2 (LCO) cathode are of significant importance to the energy-storage market, especially for portable electronics. However, their development is greatly limited by the inferior performance under high voltages and challenging temperatures. Here, highly stable lithium (Li) metal batteries with LCO cathode, through the design of in situ formed, stable electrode/electrolyte interphases on both the Li anode and the LCO cathode, with an advanced electrolyte, are reported. The LCO cathode can deliver a high specific capacity of approximate to 190 mAh g(-1) and show greatly improved cell performances under a high charge voltage of 4.5 V (even up to 4.55 V) and a wide temperature range from -30 to 55 degrees C. This work points out a promising approach for developing Li||LCO batteries for practical applications. This approach can also be used to improve the high-voltage performance of other batteries in a broad temperature range.
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