高师理科学刊2024，Vol.44Issue(6)：54-61,8.DOI:10.3969/j.issn.1007-9831.2024.06.009
蛋黄-壳NiCoP@N-C材料的制备及其储钠特性研究
Preparation of yolk-shell structured NiCoP@N-C material for sodium ion batteries
摘要
Abstract
NiCo-based phosphides are considered to be the most promising materials for sodium ion electrodes due to their excellent electrical conductivity and high theoretical capacity.However,NiCo-based phosphides undergo severe volume strain during the sodium insertion/extraction processes leading to the reduction of multiplicity characteristics and substantial decay of cycling stability.To address the problems,the yolk-shell structured NiCoP@N-C material was prepared by dopamine coating-calcined-phosphide treatment.In this material,the nitrogen-doped carbon layer effectively improves the conductivity and structural integrity of the electrode material,and the yolk-shell structured NiCoP@N-C material significantly slows down the volumetric expansion during the sodium insertion/extraction processes.When used as an anode material for sodium-ion batteries,the as-obtained NiCoP@N-C exhibits excellent electrochemical performance:the reversible specific capacity was still as high as 462.3 mAh·g-1 after 100 cycles at a current density of 0.1 A·g-1.关键词
NiCo基磷化物/NiCoP@N-C材料/钠离子电池/负极材料Key words
NiCo-based phosphides/NiCoP@N-C material/sodium-ion battery/anode material分类
化学化工引用本文复制引用
侯宇欣,孙立,刘凯月,党莹,蒋昊纯,赵冰..蛋黄-壳NiCoP@N-C材料的制备及其储钠特性研究[J].高师理科学刊,2024,44(6):54-61,8.基金项目
黑龙江省省属高等学校基本科研业务费科研项目(YSTSXK201845)——植物性食品加工技术特色学科专项 （YSTSXK201845）
黑龙江省表面活性剂与工业助剂重点实验室开放课题基金资助项目(BMHXJKF 007) （BMHXJKF 007）
齐齐哈尔大学大学生创新创业训练计划项目(YJSCX2021011) （YJSCX2021011）
