Creating Unidirectional Fast Ion Diffusion Channels in G/NiS2-MoS2 Heterostructures for High‐Performance Sodium‐Ion Batteries
Creating Unidirectional Fast Ion Diffusion Channels in G/NiS2-MoS2 Heterostructures for High‐Performance Sodium‐Ion Batteries
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在高性能钠离子电池的 G/NiS2-MoS2 异质结构中创建单向快速离子扩散通道
DOI：
10.1002/smll.202200782
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发表时间：
2022
期刊：
影响因子：
13.3
通讯作者：
Ziwei Li
中科院分区：
文献类型：
--
作者：
Jianhua Huang;Yongsheng Yao;Ming Huang;Yufei Zhang;Yunfei Xie;Mingliang Li;Liuli Yang;Xiaolin Wei;Ziwei Li
Exploring novel electrode composites and their unique interface physics plays a significant role in tuning electrochemical properties for boosting the performance of sodium‐ion batteries (SIBs). Herein, mixed‐dimensional G/NiS2‐MoS2heterostructures are synthesized in a low‐cost meteorological vulcanization process. The stable graphene supporting layer and nanowire heterostructure guarantee an outstanding structural stability to tolerate certain volume changes during the charge/discharge process. The rational construction of NiS2‐MoS2heterostructures induces abundant interfaces and unique ion diffusion channels, which render fast electrochemical kinetics and superior reversible capacities for high‐performance SIBs. Interestingly, theoretical studies reveal that the anisotropic diffusion barriers create unidirectional “high‐speed” channels, which can lead to ordered and fast Na+insertion/extraction in designed heterostructures. G/NiS2‐MoS2anode exhibits a high capacity of 509.6 mA h g−1after 500 cycles and a coulombic efficiency >99% at 0.5 A g−1, which also displays excellent cycling performance with the capacity of 383.8 mA h g−1after the 1000 cycles at 5 A g−1. Furthermore, full cells are constructed exhibiting a high capacity of 70 mA h g−1at 0.1 A g−1after 150 cycles and applied to light LEDs. This study provides a feasible strategy of constructing mixed‐dimensional heterostructures for SIBs with excellent performance and a long service lifetime.
