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Rational Design of N-Doped CuS@C Nanowires toward High-Performance Half/Full Sodium-Ion Batteries
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-07-07 , DOI: 10.1021/acssuschemeng.0c03273
Dan Zhao 1 , Mengmeng Yin 1 , Caihong Feng 1 , Kun Zhan 1 , Qingze Jiao 1, 2 , Hansheng Li 1 , Yun Zhao 1
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-07-07 , DOI: 10.1021/acssuschemeng.0c03273
Dan Zhao 1 , Mengmeng Yin 1 , Caihong Feng 1 , Kun Zhan 1 , Qingze Jiao 1, 2 , Hansheng Li 1 , Yun Zhao 1
Affiliation
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Transition-metal sulfides (TMSs) are considered excellent anode materials for sodium-ion batteries by virtue of decent capabilities based on multielectron conversion reactions. Herein, N-doped carbon-coated CuS nanowires (CuS NWs@NC) were facilely fabricated via a refluxing method, following in situ dopamine polymerization and sulfidation process. Employed as anodes for SIBs, the CuS NWs@NC deliver a highly invertible capacity of 571.1 mA h g–1 after 100 cycles at 0.2 A g–1 and a competitive rate capability of 294.4 mA h g–1 even at 20 A g–1. Remarkably, they exhibit a competitive long-life cyclic stability (216.7 mA h g–1 at 20 A g–1, 81.7% capacity retention over 10,000 cycles). Furthermore, the galvanostatic intermittent titration technique test reveals that the unique nanoarchitecture boosts the Na+ diffusion ability, guaranteeing superb cyclability and exceptional rate performance. Finally, a NVP/C||CuS NW@NC full battery was facilely constructed, which demonstrates a steady capacity of 220 mA h g–1 at 0.2 A g–1 over 200 cycles. The superior sodium storage performance is likely due to the one-dimensional coaxial core–shell nanoarchitecture and synergistic effect of the inner CuS nanowires with the outer conductive nitrogen-doped carbon layer, which provide a highway for fast electron/ion transport, restrain stress and agglomeration of CuS during cycling, and offer a significant capacitive-controlled capacity contribution. This scalable design provides a new strategy for improving the sodium storage property of other TMSs.
中文翻译：
针对高性能半/全钠离子电池的N掺杂CuS @ C纳米线的合理设计
过渡金属硫化物（TMS）被认为是钠离子电池的极佳阳极材料，因为它具有基于多电子转化反应的出色功能。在此，在原位多巴胺聚合和硫化过程之后，通过回流法容易地制备了N掺杂碳包覆的CuS纳米线（CuS NWs @ NC）。作为SIB的阳极，CuS NWs @ NC在0.2 A g –1的100个循环后可提供571.1 mA hg –1的高可逆容量，甚至在20 A g –1时也具有294.4 mA hg –1的竞争速率。值得注意的是，它们表现出竞争性的长寿命的循环稳定性（216.7毫安汞柱-1在20 A G -1，在10,000个循环中保留了81.7％的容量）。此外，恒电流间歇滴定技术测试表明，独特的纳米结构提高了Na +扩散能力，从而确保了极好的循环能力和出色的速率性能。最后，NVP / C ||的CuS NW @ NC满电池轻便构造，这表明220毫安Hg的稳定容量-1在0.2 A克-1超过200个周期。优异的钠存储性能可能归因于一维同轴核-壳纳米结构以及内部CuS纳米线与外部导电氮掺杂碳层的协同效应，这为快速电子/离子传输，抑制应力和循环过程中CuS的聚集，并提供了显着的电容控制容量贡献。这种可扩展的设计为改善其他TMS的钠存储特性提供了新的策略。
更新日期：2020-07-07
中文翻译：
针对高性能半/全钠离子电池的N掺杂CuS @ C纳米线的合理设计
过渡金属硫化物（TMS）被认为是钠离子电池的极佳阳极材料，因为它具有基于多电子转化反应的出色功能。在此，在原位多巴胺聚合和硫化过程之后，通过回流法容易地制备了N掺杂碳包覆的CuS纳米线（CuS NWs @ NC）。作为SIB的阳极，CuS NWs @ NC在0.2 A g –1的100个循环后可提供571.1 mA hg –1的高可逆容量，甚至在20 A g –1时也具有294.4 mA hg –1的竞争速率。值得注意的是，它们表现出竞争性的长寿命的循环稳定性（216.7毫安汞柱-1在20 A G -1，在10,000个循环中保留了81.7％的容量）。此外，恒电流间歇滴定技术测试表明，独特的纳米结构提高了Na +扩散能力，从而确保了极好的循环能力和出色的速率性能。最后，NVP / C ||的CuS NW @ NC满电池轻便构造，这表明220毫安Hg的稳定容量-1在0.2 A克-1超过200个周期。优异的钠存储性能可能归因于一维同轴核-壳纳米结构以及内部CuS纳米线与外部导电氮掺杂碳层的协同效应，这为快速电子/离子传输，抑制应力和循环过程中CuS的聚集，并提供了显着的电容控制容量贡献。这种可扩展的设计为改善其他TMS的钠存储特性提供了新的策略。
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