标题：Embedding ZnSe nanoparticles in a porous nitrogen-doped carbon framework for efficient sodium storage
作者：Li, Yumei; Wu, Fangfang; Xiong, Shenglin
作者机构：[Li, Yumei] Xinjiang Inst Engn, Sch Dept Chem & Environm Engn, Xinjiang 830091, Urumqi, Peoples R China.; [Li, Yumei; Wu, Fangfang; Xiong, Shenglin] 更多
通讯作者：Xiong, Shenglin;Xiong, SL
通讯作者地址：[Xiong, SL]Shandong Univ, Sch Chem & Chem Engn, Key Lab Colloid & Interface Chem, Minist Educ, Jinan 250100, Shandong, Peoples R China.
关键词：ZnSe nanoparticles; Nitrogen-doped carbon; Hybrid structures; Anode;; Sodium-ion batteries
摘要：Sodium-ion batteries (SIBs) have drawn great attentions due to the abundance of sodium and their similar electrochemical principles to that of lithium-ion batteries. However, larger ionic radius of Na+ greatly retards Na+ transport and causes severe volume expansion. Therefore, delicate design of anodes for SIBs that can reversibly accommodate sodium ions is a crucial, but challenging task. In this paper, we rationally engineer a hybrid composite featured with ZnSe nanoparticles uniformly wrapped in three-dimensional (3D) porous nitrogen-doped carbon matrix (ZnSe NP@p-NC). The synthesis is achieved through the domination of the self-template-induced reaction between Zn-based zeolitic imidazolate framework (ZIF-8) nanododecahedra and Se powder at an elevated temperature. Due to the structural and compositional merits, including a 3D porous structure, the uniform distribution of the small-size ZnSe nanoparticles, and graphitic carbon matrix, these unique ZnSe NP@p-NC popcorn balls display a high sodium-storage performance, including cycling stability (181.7 mAh g(-1) after 2000 cycles at 10 A g(-1)), rate capability, and initial Coulombic efficiency. (C) 2018 Elsevier Ltd. All rights reserved.