Pseudocapacitive Na-Ion Storage Boosts High Rate and Areal Capacity of Self-Branched 2D Layered Metal Chalcogenide Nanoarrays

Chao, Dongliang; Liang, Pei; Chen, Zhen; Bai, Linyi; Shen, Heping; Liu, Xiaoxu; Xia, Xinhui; Zhao, Yanli; Savilov, Serguei V.; Lin, Jianyi; Shen, Zexiang

doi:10.1021/acsnano.6b05566

articleACS NanoOct 21, 2016Closed access

Pseudocapacitive Na-Ion Storage Boosts High Rate and Areal Capacity of Self-Branched 2D Layered Metal Chalcogenide Nanoarrays

DCDongliang Chao PLPei Liang ZCZhen Chen LBLinyi Bai HSHeping Shen

Nanyang Technological University · China Jiliang University · +5 more institutions

PubMed

Indexed incrossrefpubmed

Abstract

The abundant reserve and low cost of sodium have provoked tremendous evolution of Na-ion batteries (SIBs) in the past few years, but their performances are still limited by either the specific capacity or rate capability. Attempts to pursue high rate ability with maintained high capacity in a single electrode remains even more challenging. Here, an elaborate self-branched 2D SnS2 (B-SnS2) nanoarray 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…

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Topics & keywords

Topics

Keywords

Pseudocapacitance
Materials science
Chalcogenide
Electrode
Nanoengineering
Nanotechnology
Raman spectroscopy
Chemical engineering

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