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ZnMn2(PO4)2·nH2O: An H2O-Imbedding-Activated Cathode for Robust Aqueous Zinc-Ion Batteries

  • Chunhui Wang
  • , Keyi Xian
  • , Shuangshuang Zhao
  • , Lishan Yang*
  • , Junjian Zhou
  • , Yahui Yang
  • , Xiangping Chen
  • , Jiang Yin
  • , Jun Wang*
  • , Haozhe Qin
  • , Zhongliang Tian
  • , Yanqing Lai
  • , Zhongchang Wang
  • , Bao Zhang
  • , Haiyan Wang*
  • *此作品的通讯作者
  • Hunan Normal University
  • University of South China
  • International Iberian Nanotechnology Laboratory
  • Wuhan University
  • Central South University

科研成果: 期刊稿件文章同行评审

摘要

Component modulation endows Mn-based electrodes with prominent energy storage properties due to their adjustable crystal structure characteristics. Herein, ZnMn2(PO4)2·nH2O (ZMP·nH2O) was obtained by a hydration reaction from ZnMn2(PO4)2 (ZMP) during an electrode-aging evolution. Benefiting from the introduction of lattice H2O molecules into the ZMP structure, the ion transmission path has been expanded along with the extended d-spacing, which will further facilitate the ZMP → ZMP·nH2O phase evolution and electrochemical reaction kinetics. Meanwhile, the hydrogen bond can be generated between H2O and O in PO43-, which strengthens the structure stability of ZMP·nH2O and lowers the conversion barrier from ZMP to ZMP·4H2O during the Zn2+ uptake/removal process. Thereof, ZMP·nH2O delivers enhanced electrochemical reaction kinetics with robust structure tolerance (106.52 mA h g-1 at 100 mA g-1 over 620 cycles). This high-energy aqueous Zn||ZMP·nH2O battery provides a facile strategy for engineering and exploration of high-performance ZIBs to realize the practical application of Mn-based cathodes.

源语言英语
页(从-至)9816-9823
页数8
期刊Nano Letters
24
32
DOI
出版状态已出版 - 14 8月 2024
已对外发布

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