首页|Design of antimony nanocomposite for high areal capacity sodium battery anodes

Design of antimony nanocomposite for high areal capacity sodium battery anodes

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  • NSTL
  • Elsevier
? 2022 Elsevier B.V.Antimony (Sb) is attractive as a high-capacity anode for sodium-ion batteries, but undergoes structural degradation and instability of the solid-electrolyte interphase caused by the large volume change during cycling. Here, we demonstrate a unique Sb-based composite anode by embedding the Sb nanoparticles into the conductive hierarchical porous graphitic carbon (HPGC) that leaves enough room for volume change and is further encapsulated by a uniform conductive nitrogen-doped carbon (NC) layer to act as an electrolyte barrier. Such a design enables the Sb@HPGC/NC composite to exhibit a high capacity of 639 mAh g?1, stable cycling stability, and a commercial-level areal capacity of 3.11 mAh cm?2. In addition, full cells by coupling with sodium vanadium phosphate cathode deliver a high energy density of 223.4 Wh kg?1 with superior rate performance. This work provides a bright way for the rational design and construction of Sb-based anode materials for advanced SIBs.

Antimony-based anodeNitrogen-doped carbon layerPorous carbon frameworkSodium-ion battery

Wang Y.、Wang Q.、Geng Y.、Zhang J.、Mao W.、Wu J.、Ai G.

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Tianjin Key Laboratory of Structure and Performance for Functional Molecules College of Chemistry Tianjin Normal University

Tianjin International Joint Research Centre of Surface Technology for Energy Storage Materials College of Physics and Materials Science Tianjin Normal University

2022

10.1016/j.jallcom.2022.165336

Journal of Alloys and Compounds

Journal of Alloys and Compounds

EISCI
ISSN：0925-8388
年,卷(期)：2022.914
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