Unprecedented Superhigh-Rate and Ultrastable Anode for High-Power Battery via Cationic Disordering

Wei Wu, Mingxian Liu, Yi Pei, Wenjin Li, Wang Lin, Qiyao Huang, Man Wang, Haitao Yang, Libo Deng, Lei Yao, Zijian Zheng

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

High-power lithium-ion batteries (LIBs) are critical for power-intensive applications; however, their development is largely hindered by the lack of anode materials that have stability and high capacity at high charging/discharging rates. Herein, a cationic disordering strategy is reported to build an ideal high-power anode with boosted intercalation kinetics and a stable framework. A novel titanium niobate (TiNb2O7) anode with unique predistorted Nb(Ti)O6 octahedrons (pd-TNO) is developed by introducing cation disorder, which allows ultrafast Li+ storage within seconds and exceptional stability over long cycling at high rates. The pd-TNO delivers an outstanding specific capacity of 153 mAh g−1 at 100 C, 20 times higher than that of conventional TNO anodes without cationic disordering, and retains 42.8% of the capacity after 15,000 cycles. Using the pd-TNO anode, a high-power LIB with an unprecedented power density of 91,197 W kg−1 at 200 C, which is approximately eight times higher than that of the advanced commercial high-power anode Li4Ti5O12 (11,813 W kg−1 at 50 C), is demonstrated. Importantly, the pd-TNO is prepared under ambient conditions via a high-throughput process, and it exhibits considerable potential for scalability for practical applications.

Original languageEnglish
Article number2201130
JournalAdvanced Energy Materials
Volume12
Issue number30
DOIs
Publication statusPublished - 11 Aug 2022

Keywords

  • anodes
  • energy storage
  • high-power batteries
  • octahedral distortion
  • titanium niobium oxide

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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