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High Areal Capacity Li‐Ion Storage of Binder‐Free Metal Vanadate/Carbon Hybrid Anode by Ion‐Exchange Reaction
Author(s) -
Zhou Chengshuang,
Lu Jiamin,
Hu Mingxiang,
Huang ZhengHong,
Kang Feiyu,
Lv Ruitao
Publication year - 2018
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201801832
Subject(s) - materials science , anode , energy storage , vanadate , nanotechnology , nanoparticle , carbon fibers , ion , metal , nanostructure , lithium (medication) , chemical engineering , electrode , composite material , composite number , chemistry , metallurgy , medicine , power (physics) , physics , organic chemistry , quantum mechanics , endocrinology , engineering
Abstract Storing more energy in a limited device area is very challenging but crucial for the applications of flexible and wearable electronics. Metal vanadates have been regarded as a fascinating group of materials in many areas, especially in lithium‐ion storage. However, there has not been a versatile strategy to synthesize flexible metal vanadate hybrid nanostructures as binder‐free anodes for Li‐ion batteries so far. A convenient and versatile synthesis of M x V y O x+2.5y @carbon cloth (M = Mn, Co, Ni, Cu) composites is proposed here based on a two‐step hydrothermal route. As‐synthesized products demonstrate hierarchical proliferous structure, ranging from nanoparticles (0D), and nanobelts (1D) to a 3D interconnected network. The metal vanadate/carbon hybrid nanostructures exhibit excellent lithium storage capability, with a high areal specific capacity up to 5.9 mAh cm −2 (which equals to 1676.8 mAh g −1 ) at a current density of 200 mA g −1 . Moreover, the nature of good flexibility, mixed valence states, and ultrahigh mass loading density (over 3.5 mg cm −2 ) all guarantee their great potential in compact energy storage for future wearable devices and other related applications.