材料科学
电极
碳化
硒化物
碳纤维
化学工程
储能
制作
电导率
多孔性
纳米技术
复合数
复合材料
化学
冶金
扫描电子显微镜
物理化学
硒
替代医学
功率(物理)
量子力学
病理
工程类
物理
医学
作者
Hongwei Guo,Guishu Liu,Mengying Wang,Yan Zhang,Weiqin Li,Kai Chen,Yafei Liu,Mengyuan Yue,Yijing Wang
标识
DOI:10.1002/asia.202000189
摘要
Sodium-ion batteries (SIBs) based on flexible electrode materials are being investigated recently for improving sluggish kinetics and developing energy density. Transition metal selenides present excellent conductivity and high capacity; nevertheless, their low conductivity and serious volume expansion raise challenging issues of inferior lifespan and capacity fading. Herein, an in-situ construction method through carbonization and selenide synergistic effect is skillfully designed to synthesize a flexible electrode of bone-like CoSe2 nano-thorn coated on porous carbon cloth. The designed flexible CoSe2 electrode with stable structural feature displays enhanced Na-ion storage capabilities with good rate performance and outstanding cycling stability. As expected, the designed SIBs with flexible BL-CoSe2 /PCC electrode display excellent reversible capacity with 360.7 mAh g-1 after 180 cycles at a current density of 0.1 A g-1 .
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