Journal
CHEMELECTROCHEM
Volume 3, Issue 4, Pages 531-536Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/celc.201500520
Keywords
concentrated electrolytes; coulombic efficiency; electrochemistry; lithium; rechargeable batteries
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Funding
- National Natural Science Foundation of China [51172083, 51222210, 51472268]
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A new type of concentrated electrolyte composed of Li[(FSO2)N(SO2CF3)] (LiFTFSI), Li[N(SO2F)(2)] (LiFSI), and ether solvents can improve the cycling stability of lithium (Li) metal and inhibit Li-metal dendritic growth. The high average coulombic efficiency of >95% and excellent cycling performance of >250 cycles for the Li vertical bar copper cells have been achieved, even at a high current density of 3 mA cm(-2). Moreover, the Li vertical bar LiFePO4 cell exhibits superior cycling stability with capacity retention of >92% at 0.2 C for more than 200 cycles and excellent C-rate capability.
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