High Areal Capacity Li‐Ion Storage of Binder‐Free Metal Vanadate/Carbon Hybrid Anode by Ion‐Exchange Reaction. Issue 35 (31st July 2018)

• Record Type: Journal Article
• Authors: Zhou, Chengshuang; Lu, Jiamin; Hu, Mingxiang; Huang, Zheng‐Hong; Kang, Feiyu; Lv, Ruitao
• Is Part Of: Small. Volume 14:Issue 35(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-07-31
• Subjects: flexible electrodes -- lithium‐ion batteries -- metal vanadates -- versatile synthesis; Nanotechnology -- Periodicals; Nanoparticles -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1002/smll.201801832
• Languages: English
• ISSNs: 1613-6810

Abstract

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 Mx Vy Ox+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. Abstract : A convenient and versatile synthesis of Mx Vy Ox+2.5y @carbon cloth (M = Mn, Co, Ni, Cu) composites is proposed based on a two‐step hydrothermal route. As‐synthesized products demonstrate hierarchical proliferous structure, good flexibility, mixed valence states, ultrahigh mass loading density, and excellent lithium storage capability with a high areal specific capacity, all guaranteeing great potential in compact energy storage for future wearable devices.