Yuxiang Zhang , Bo Han , Qiang Gao , Zhao Cai , Chenggang Zhou , Guangwu Hu , Jiantao Li , Ruimin Sun
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引用次数: 0
摘要
构建异质结构是提高过渡金属卤化物材料储钠性能的有效方法。本文提出了一种简单、安全、可控的一步水热法合成 MoS2/NiS2 异质结构。由于 MoS2 和 NiS2 的带隙和功函数不同,电荷在 MoS2/NiS2 异质界面上重新分配,从而加速了电子和 Na+ 的迁移。异质界面为储存 Na+ 提供了额外的活性位点,从而提高了异质结构的钠储存能力。此外,NiS2 和 MoS2 不同的氧化还原电位促进了 MoS2/NiS2 异质结构在电化学反应过程中的结构稳定性。因此,所获得的 MoS2/NiS2 异质结构具有卓越的速率特性(10 A g-1 时为 339.4 mAh g-1)和超稳定的循环稳定性(1 A g-1 时循环 350 次后为 480.5 mAh g-1)。本文提出了一种制造具有优异钠存储特性的异质结构阳极的有效策略。
Construction of MoS2/NiS2 heterostructure with fast interfacial reaction kinetics for ultrafast sodium storage
Constructing heterostructure is a valid method to reinforcing sodium storage performance of transition metal chalcogenides materials. Herein, a simple, safe and controllable one step hydrothermal method is proposed to synthesize MoS2/NiS2 heterostructure. Due to the difference in band gaps and work functions of MoS2 and NiS2, the charges are redistributed at the MoS2/NiS2 heterointerfaces, thereby accelerating the migration of electrons and Na+. The heterointerfaces provide extra active sites for storing Na+, thus increasing the sodium storage capacity of the heterostructure. Furthermore, the distinct redox potentials of NiS2 and MoS2 promote the structural stability of MoS2/NiS2 heterostructure during the electrochemical reaction processes. Consequently, the obtained MoS2/NiS2 heterostructure exhibits superior rate properties (339.4 mAh g−1 at 10 A g−1) and ultra-stable cycling stability (480.5 mAh g−1 after 350 cycles at 1 A g−1). This paper presents a valid strategy for creating heterostructure anodes with excellent sodium storage properties.
期刊介绍:
Nano Energy is a multidisciplinary, rapid-publication forum of original peer-reviewed contributions on the science and engineering of nanomaterials and nanodevices used in all forms of energy harvesting, conversion, storage, utilization and policy. Through its mixture of articles, reviews, communications, research news, and information on key developments, Nano Energy provides a comprehensive coverage of this exciting and dynamic field which joins nanoscience and nanotechnology with energy science. The journal is relevant to all those who are interested in nanomaterials solutions to the energy problem.
Nano Energy publishes original experimental and theoretical research on all aspects of energy-related research which utilizes nanomaterials and nanotechnology. Manuscripts of four types are considered: review articles which inform readers of the latest research and advances in energy science; rapid communications which feature exciting research breakthroughs in the field; full-length articles which report comprehensive research developments; and news and opinions which comment on topical issues or express views on the developments in related fields.