Binding Nanosized Cobalt Chalcogenides in B,N‐Codoped Graphene for Enhanced Sodium Storage

• DOI: 10.1002/smtd.201800170
• Publication Date: 2018-07-25T13:46:22Z
• Authors: Xiaolong Cheng; Dongjun Li; Fanfan Liu; Rui Xu; Yan Yu
• Keywords: 02 engineering and technology; 0210 nano-technology; 7. Clean energy

Abstract A general process is developed to prepare binding nanosized cobalt chalcogenides in B,N‐codoped graphene (CoSe 2 /BNG and CoS /BNG). When used as anodes for sodium‐ion batteries, the CoSe deliver excellent sodium‐storage performance. The displays a reversible capacity of 270 mAh g −1 after 2000 cycles at current density 1 . Even 20 , it can still give 187 Moreover, shows 387 10 demonstrating its superior high rate enhanced properties nanocomposites may be attributed conductive network, sodium storage B,N‐codoping graphene, small nanocrystallites that shorten electronic ionic diffusion length throughout electrode.