Enhanced electrochemical performance of Li2.72Na0.31MnPO4CO3 as a cathode material in water-in-salt electrolytes

A carbonophosphate compound of Li2.72Na0.31MnPO4CO3 was synthesized via ion exchange. The initial discharge capacity of Li2.72Na0.31MnPO4CO3 in 15 molal (or 15 m) LiTFSI was 110 mA h g(-1) at 2 mA cm(-2) (similar to 0.5C). Due to the decomposition of Li2.72Na0.31MnPO4CO3, the capacity retention degraded to 64% after 100 cycles.

Automated summary

A carbonophosphate compound of Li2.72Na0.31MnPO4CO3 was synthesized via ion exchange, with an initial discharge capacity of 110 mA h g(-1) at 2 mA cm(-2) in 15 molal LiTFSI. However, due to the decomposition of Li2.72Na0.31MnPO4CO3, the capacity retention degraded to 64% after 100 cycles.