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A Polyanionic,Quasi-zero-strain and Open-framework K_(0.76)V_(0.55)Nb_(0.45)OPO_(4) for Sodium-ion Batteries
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作者 liu jian-dong-yong YU Xu +1 位作者 BAO Jing-Ze LIN Ying-Xi 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2021年第12期1631-1638,1553,共9页
A carbon-coated K_(0.76)V_(0.55)Nb_(0.45)OPO_(4)(KVNP@C)polyanion material was successfully synthesized by a simple sol-gel method.The KVNP@C possesses a highly stable inorganic open-framework structure,which is hard ... A carbon-coated K_(0.76)V_(0.55)Nb_(0.45)OPO_(4)(KVNP@C)polyanion material was successfully synthesized by a simple sol-gel method.The KVNP@C possesses a highly stable inorganic open-framework structure,which is hard to be affected by the Na^(+) intercalation/deintercalation when used as an anode material for sodium-ion batteries(NIBs).The assembled KVNP@C/Na half-cell shows a capacity retention of 81.2%and an average Coulombic efficiency of 99.8%at a current density of 300 mA/g after 1500 cycles.In-situ XRD analysis reveals a single-phase solid solution reaction mechanism with a lattice expansion of 4.76%.This work sheds insights into the quest for developing novel polyanion-based anode materials for sodium-ion batteries. 展开更多
关键词 anode material sodium-ion batteries high structural stability solid solution reaction
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