Ultrafast-Charging Silicon-Based Coral-Like Network Anodes for Lithium-Ion Batteries with High Energy and Power Densities

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Title
Ultrafast-Charging Silicon-Based Coral-Like Network Anodes for Lithium-Ion Batteries with High Energy and Power Densities
Author(s)
Bin Wang; Jeogeon Ryu; Sungho Choi; Xinghao Zhang; Didier Pribat; Xianglong Li; Linjie Zhi; Soojin Park; Rodney S. Ruoff
Publication Date
2019-02
Journal
ACS NANO, v.13, no.2, pp.2307 - 2315
Publisher
AMER CHEMICAL SOC
Abstract
Fast charging rate and large energy storage are becoming key elements for the development of next-generation batteries, targeting high-performance electric vehicles. Developing electrodes with high volumetric and gravimetric capacity that could be operated at a high rate is the most challenging part of this process. Using silicon as the anode material, which exhibits the highest theoretical capacity as a lithium-ion battery anode, we report a binder-free electrode that interconnects carbon-sheathed porous silicon nanowires into a coral-like network and shows fast charging performance coupled to high energy and power densities when integrated into a full cell with a high areal capacity loading. The combination of interconnected nanowires, porous structure, and a highly conformal carbon coating in a single system strongly promotes the reaction kinetics of the electrode. This leads to fast-charging capability while maintaining the integrity of the electrode without structural collapse and, thus, stable cycling performance without using binder and conductive additives. Specifically, this anode shows high specific capacities (over 1200 mAh g -1 ) at an ultrahigh charging rate of 7 C over 500 charge-discharge cycles. When coupled with a commercial LiCoO 2 or LiFePO 4 cathode in a full cell, it delivers a volumetric energy density of 1621 Wh L -1 with a LiCoO 2 cathode and a power density of 7762 W L -1 with a LiFePO 4 cathode. Copyright © 2019 American Chemical Society.
URI
https://pr.ibs.re.kr/handle/8788114/5709
ISSN
1936-0851
Appears in Collections:
Center for Multidimensional Carbon Materials(다차원 탄소재료 연구단) > Journal Papers (저널논문)
Files in This Item:
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