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Интеллектуальная Система Тематического Исследования НАукометрических данных |
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Pseudocapacitive Na-Ion Storage Boosts High-Rate and Areal Capacity of Self-Branched 2D Layered Metal Chalcogenide Nanoarraysстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Dongliang Chao, Pei Liang, Zhen Chen, Linyi Bai, Shen He, Xiaoxu Liu, Xinhui Xia, Yanli Zhao, Savilov Serguei V., Jianyi Lin, Xiang Shen and Ze
- Журнал: ACS Nano
- Год издания: 2016
- Издательство: American Chemical Society
- Местоположение издательства: United States
- DOI: 10.1021/acsnano.6b05566
- Аннотация: The abundant reservation and low cost of sodium have provoked tremendous evolution of Na-ion batteries (SIBs) in the past few years, but their performances were still limited either by the specific capacity or rate capability. Attempts to pursuit high-rate ability with maintained high-capacity in a single electrode remains even more challenging. Here, an elaborate self-branched 2D SnS2 (B-SnS2) nanoarrays electrode is designed by a facile hot bath method for Na storage. This interesting electrode exhibits areal reversible capacity of ca. 3.7 mAh cm-2 (900 mAh g-1), and rate capability of 1.6 mAh cm-2 (400 mAh g-1) at 40 mA cm-2 (10 A g-1). Improved extrinsic pseudocapacitive contribution is demonstrated as the origin of fast kinetics of alloying-based SnS2 electrode. Sodiation dynamics analysis based on first-principle calculations, ex-situ HRTEM, in-situ impedance, and in-situ Raman technologies verify the S-edge effect to the fast Na+ migration, reversible and sensitive structure evolution during high-rate charge/discharge. The excellent alloying-based pseudocapacitance and unsaturated edge-effect enabled by self-branched surface nanoengineering could be a promising strategy for promoting development of SIBs with both high capacity and rate response.
- Добавил в систему: Савилов Сергей Вячеславович