Black phosphorus(BP)anode with high capacity(2596 mAh g^(-1))and suitable lithiation potential(0.7 V vs.Li^(+)/Li)is an ideal candidate for high-energy-density and high-safety lithium-ion batteries,however,the practic...Black phosphorus(BP)anode with high capacity(2596 mAh g^(-1))and suitable lithiation potential(0.7 V vs.Li^(+)/Li)is an ideal candidate for high-energy-density and high-safety lithium-ion batteries,however,the practical implementation is greatly limited by its slow reaction kinetics and huge volume expansion.Here,inspired by nature,liquid metal(LM)is explored as a self-heal agent,which can well stabilize the BP anode through buffering the volumetric expansion and re-activating“dead P and Li x P”.Moreover,LM also acts as a good catalyst,which can adjust Li ion concentration and reduce the activation energy of delithiation reaction,thus prolonging the cycling life.Therefore,the LM modified BP/graphite(G)composite delivers an excellent high-rate performance of 1123 mAh g^(-1)at 4 C with 80.0%capacity retention after 200 cycles,a superior wide-temperature performance of 1547.5 mAh g^(-1)and 569.0 mAh g^(-1)at 50℃and-20℃,respectively.展开更多
基金supported by the National Key Research and Development Program of China(2023YFB2503600)Yunnan Major Scientific and Technological Projects(grant NO.202402AF080004)+1 种基金the National Natural Science Foundation of China(22279089)the Municipal Key R&D Program of Ningbo(2023Z109).
文摘Black phosphorus(BP)anode with high capacity(2596 mAh g^(-1))and suitable lithiation potential(0.7 V vs.Li^(+)/Li)is an ideal candidate for high-energy-density and high-safety lithium-ion batteries,however,the practical implementation is greatly limited by its slow reaction kinetics and huge volume expansion.Here,inspired by nature,liquid metal(LM)is explored as a self-heal agent,which can well stabilize the BP anode through buffering the volumetric expansion and re-activating“dead P and Li x P”.Moreover,LM also acts as a good catalyst,which can adjust Li ion concentration and reduce the activation energy of delithiation reaction,thus prolonging the cycling life.Therefore,the LM modified BP/graphite(G)composite delivers an excellent high-rate performance of 1123 mAh g^(-1)at 4 C with 80.0%capacity retention after 200 cycles,a superior wide-temperature performance of 1547.5 mAh g^(-1)and 569.0 mAh g^(-1)at 50℃and-20℃,respectively.
