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Confinement Growth of Layered WS2 in Hollow Beaded Carbon Nanofibers with Synergistic Anchoring Effect to Reinforce Li+ /Na+ Storage Performance.
Small ( IF 13.0 ) Pub Date : 2020-06-05 , DOI: 10.1002/smll.202000695 Huayu Wu 1 , Xing Chen 1 , Chen Qian 2 , Hui Yan 3 , Chenyi Yan 1 , Nuo Xu 1 , Yuanzhe Piao 4, 5 , Guowang Diao 1 , Ming Chen 1, 6
Small ( IF 13.0 ) Pub Date : 2020-06-05 , DOI: 10.1002/smll.202000695 Huayu Wu 1 , Xing Chen 1 , Chen Qian 2 , Hui Yan 3 , Chenyi Yan 1 , Nuo Xu 1 , Yuanzhe Piao 4, 5 , Guowang Diao 1 , Ming Chen 1, 6
Affiliation
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Novel nitrogen doped (N‐doped) hollow beaded structural composite carbon nanofibers are successfully applied for lithium‐ion batteries (LIBs) and sodium‐ion batteries (SIBs). Tungsten disulfide (WS2) nanosheets are confined, through synergistic anchoring, on the surface and inside of hollow beaded carbon nanofibers (HB CNFs) via a hydrothermal reaction method to construct the hierarchical structure HB WS2@CNFs. Benefiting from this unique advantage, HB WS2@CNFs exhibits remarkable lithium‐storage performance in terms of high rate capability (≈351 mAh g−1 at 2 A g−1) and stable long‐term cycle (≈446 mAh g−1 at 1 A g−1 after 100 cycles). Moreover, as an anode material for SIBs, HB WS2@CNFs obtains excellent long cycle life and rate performance. During the charging/discharging process, the evolution of morphology and composition of the composite are analyzed by a set of ex situ methods. This synergistic anchoring effect between WS2 nanosheets and HB CNFs is capable of effectively restraining volume expansion from the metal ions intercalation/deintercalation process and improving the cycling stability and rate performance in LIBs and SIBs.
中文翻译：
空心珠碳纳米纤维中层状WS2的封闭生长具有协同锚固作用，以增强Li + / Na +的储存性能。
新型的氮掺杂（N掺杂）空心珠结构复合碳纳米纤维已成功应用于锂离子电池（LIB）和钠离子电池（SIB）。通过协同锚固，通过水热反应方法将二硫化钨（WS 2）纳米片限制在空心珠状碳纳米纤维（HB CNF）的表面和内部，以构建分层结构HB WS 2 @CNF。从这个独特的优势，HB WS受益2个在高倍率性能方面表现出@CNFs显着的锂存储性能（≈351毫安克-1以2A克-1）和稳定的长期周期（≈446毫安克-1在1 A g -1100个周期后）。此外，HB WS 2 @CNFs作为SIBs的负极材料具有出色的长循环寿命和倍率性能。在充电/放电过程中，通过一组异位方法分析了复合材料的形貌和组成演变。WS 2纳米片和HB CNF之间的这种协同锚固效果能够有效抑制金属离子嵌入/脱嵌过程中的体积膨胀，并改善LIB和SIB中的循环稳定性和速率性能。
更新日期：2020-07-02
中文翻译：
空心珠碳纳米纤维中层状WS2的封闭生长具有协同锚固作用，以增强Li + / Na +的储存性能。
新型的氮掺杂（N掺杂）空心珠结构复合碳纳米纤维已成功应用于锂离子电池（LIB）和钠离子电池（SIB）。通过协同锚固，通过水热反应方法将二硫化钨（WS 2）纳米片限制在空心珠状碳纳米纤维（HB CNF）的表面和内部，以构建分层结构HB WS 2 @CNF。从这个独特的优势，HB WS受益2个在高倍率性能方面表现出@CNFs显着的锂存储性能（≈351毫安克-1以2A克-1）和稳定的长期周期（≈446毫安克-1在1 A g -1100个周期后）。此外，HB WS 2 @CNFs作为SIBs的负极材料具有出色的长循环寿命和倍率性能。在充电/放电过程中，通过一组异位方法分析了复合材料的形貌和组成演变。WS 2纳米片和HB CNF之间的这种协同锚固效果能够有效抑制金属离子嵌入/脱嵌过程中的体积膨胀，并改善LIB和SIB中的循环稳定性和速率性能。
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