Fig. 1: Schematic and mechanism diagram of Li-CO2 battery with RM(II)-BTC cathode.
From: Boosting a practical Li-CO2 battery through dimerization reaction based on solid redox mediator
a Schematic of Li-CO2 battery with solid RM(II)-BTC cathode. RM(II)-BTC can inhibit the shuttle effect since it is fixed at the cathode as a solid state and exhibit high CO2 adsorption, fast kinetics and reversible redox couples. b Solid RM(II)-BTC-mediated reaction mechanism towards Li2C2O4 route. RM(II)-BTC is electrochemically reduced to Li2RM(I)-BTC, which immediately reacts with CO2 to form Li2RM(II)-BTC-2CO2-. Finally, discharge product Li2C2O4 and origin RM(II)-BTC are obtained. The frame with dash-dotted line reflect that after receiving electrons and incorporating lithium ions, RM(II)-BTC can transfer to a compound of lithium and RM(I)-BTC. The gray, red, cyan, green, purple and blue balls represent C, O, Cu(II), Cu(I), Li+ and e-, respectively.
