Improved electrochemical performance of yolk-shell structured SnO2@void@C porous nanowires as anode for lithium and sodium batteries
Improved electrochemical performance of yolk-shell structured SnO2@void@C porous nanowires as anode for lithium and sodium batteries
复制标题
改善蛋黄壳结构 SnO2@void@C 多孔纳米线作为锂钠电池阳极的电化学性能
DOI：
10.1016/j.jpowsour.2016.06.011
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发表时间：
2016-08-30
影响因子：
9.2
通讯作者：
Lei, M.
中科院分区：
文献类型：
--
作者：
Li, H. Z.;Yang, L. Y.;Lei, M.
针对锂离子大体积膨胀材料设计了各种蛋黄壳结构颗粒，通过这种结构设计可以有效地提高循环稳定性和库仑效率。SnO2对锂和钠的理论存储容量分别为1494 mA h g(-1)和1378 mA h g(-1)。长期以来，SnO2的大体积膨胀问题一直被认为是SnO2基负极材料容量衰退的主要原因。本文设计了蛋黄壳结构的SnO2多孔纳米线，并首次报道了这种独特的蛋黄壳结构作为锂离子和钠离子存储的负极材料。蛋黄壳结构的多孔纳米线作为锂离子和钠离子存储的活性材料，与纯SnO2多孔纳米线相比，具有显著的循环稳定性和库仑效率。当电流密度为200 mA g(-1)时，其锂离子存储容量为1150 mA h g(-1)；在50 mA g(-1)电流密度下循环50次，容量为401 mA h g(-1)。(C)2016爱思唯尔B.V.保留所有权利。
Various yolk-shell structured particles designed for large volume expansion materials for lithium-ion storage have been reported, the cycle stability and coulombic efficiency can be effectively improved through such structure design. SnO2 has high theoretical capacity of 1494 mA h g(-1) and 1378 mA h g(-1) for lithium and sodium storage, respectively. The large volume expansion problem of SnO2 has long been considered as the primary reason for the capacity fading of SnO2 based anode materials. In this paper, the yolk-shell structured SnO2 porous nanowire has been designed, and this unique yolk-shell structure is reported as anode materials for lithium and sodium-ion storage for the first time. The yolk-shell structured porous nanowires deliver significantly improved cycle stability and coulombic efficiency as active material for both lithium and sodium-ion storage compared with that of pure SnO2 porous nanowires. It exhibits a high and stable capacity of 1150 mA h g(-1) at current density of 200 mA g(-1) for lithium-ion storage, and a capacity of 401 mA h g(-1) at current density of 50 mA g(-1) after 50 cycles for sodium ion storage. (C) 2016 Elsevier B.V. All rights reserved.