Air plasma-induced carbon fluoride enabling active C F bonds for double-high energy/power densities of Li/CFx primary battery

Lithium fluorocarbon (Li/CFx) batteries with high-energy density are widely applied in the commercial fields, but their discharge performances are limited due to the presence of electrochemical inactive CF bonds. Herein, an air-plasma-inducing chemical vapor deposition method is developed to enhance the performance by increasing the concentration of semi-ionic CF bonds. This novel method helps to reduce the internal resistance (Rb value decreases from 3.46 Ω to 1.83 Ω and Rct value decreases from 110.7 Ω to 40.08 Ω), accelerate the transmission rate, and also improve the specific capacity and energy density. Specifically, the CFx-60 cathode delivers an excellent specific capacity of 676.76 mAh g−1 at 8 C, an energy density of 1184.31 Wh/kg, and a power density of 12,251.46 W/kg. The as-designed strategy is facile and environmentally friendly, which realizes the precise adjustment of atomic-scale massively for CFx battery with excellent performance.