The design of high-performance anodes is crucial for the whole for lithium-ion batteries (LIBs). Binary transition metal oxides (bi-TMOs), especially cobalt vanadates featuring high theoretical lithium storage capacity endow them promising anode materials. However, low electric conductivity as well as tremendous volume change occurring during the process of de−/lithiation restrict their commercialization. Herein, the as-devised novel spinel Co₂VO₄ yolk-shell microspheres coated with nitrogen-doped carbon shell (Co₂VO₄@NC) were synthesized by the method of a self-templated solvothermal preparation and following in-situ pyrolysis of polydopamine (PDA) film, which demonstrates excellent properties as anode for LIBs by virtue of the unique spinel structural characteristics, mixed lithium storage mechanism, micro/nanolization of the yolk-shell structure and vital amorphous NC component. In detail, the unique Co₂VO₄@NC electrode displays the high Li ion storage capacity (1255 mAh g⁻¹ at 0.2 A g⁻¹), the superior cycling stability (1227 mAh g⁻¹ at 0.5 A g⁻¹ after 400 cycles) as well as outstanding reversible capability (remaining 862 mAh g⁻¹ when return to 0.1 A g⁻¹ from 5 A g⁻¹, larger than initial 796 mAh g⁻¹).

高性能阳极的设计对于整个锂离子电池（LIB）至关重要。二元过渡金属氧化物（bi-TMOs），特别是具有高理论锂存储容量的钒酸钴，使其成为很有前途的阳极材料。但是，低电导率以及去离子化/锂化过程中发生的巨大体积变化限制了它们的商业化。在此，通过自模板溶剂热制备方法并原位合成合成了新型掺氮碳壳的尖晶石Co ₂ VO ₄卵黄壳微球（Co ₂ VO ₄ @NC）。聚多巴胺（PDA）薄膜的热解，凭借独特的尖晶石结构特征，混合的锂存储机制，卵黄壳结构的微/醇化和重要的非晶态NC成分，证明了其作为LIB阳极的优异性能。详细地，独特的协同₂ VO ₄ @NC电极显示高Li离子储存容量（1255毫安克^-1 0.2 A G ^-1），优越的循环稳定性（1227毫安克^-1在0.5 A克^-1后400个循环），以及优秀可逆容量（剩余862毫安克^-1时返回至0.1 A克^-1从5 A G ^-1，比初始较大796毫安克^-1）。