4.6 Article

Rational design of Fe-doped K0.8Ti1.73Li0.27O4@rGO as a high-rate and long-cycle-life anode for lithium-ion batteries

期刊

出版社

IOP Publishing Ltd
DOI: 10.1088/1361-6463/ac5144

关键词

lithium-ion batteries; Fe-doped K-0; 8Ti(1); 73Li(0); 27O(4); rGO modification; high rate; long-cycle-life

资金

  1. National Natural Science Foundation of China [U1804132, 11504331, 51802288]
  2. Natural Science Foundation of Henan Province [222300420542]
  3. China Postdoctoral Science Foundation [2019M662509]
  4. Educational Department of Henan Province [22A140010]
  5. Academic Improvement Program of Physics of Zhengzhou University [2018WLTJ02]
  6. Zhengzhou University Youth Talent Start-up Grant, Zhongyuan Youth Talent Support Program of Henan Province [ZYQR201912152, ZYQR201912185]

向作者/读者索取更多资源

K0.8Ti1.73Li0.27O4 (KLTO) is an important titanium-based anode material for lithium-ion batteries (LIBs) that could replace carbonaceous materials due to its nontoxicity, low cost, and high safety performance. A Fe-doped KLTO@rGO (Fe-KLTO@rGO) composite was prepared and exhibited excellent high-rate and long-cycle-life performance as an anode in LIBs. The Fe-KLTO@rGO composite sample showed high specific capacity and stability.
K0.8Ti1.73Li0.27O4 (KLTO) is an important titanium-based anode material for lithium-ion batteries (LIBs) and is expected to become an alternative to carbonaceous materials on account of its nontoxicity, low cost, and high safety performance. However, it suffers from poor specific capacity at high charge-discharge rates due to its low conductivity and obstructed Li-ion diffusion. In this work, an Fe-doped KLTO@rGO (Fe-KLTO@rGO) composite prepared by following a simple electrostatic assembly process and its high-rate and long-cycle-life-performance as an anode in LIBs is obtained. The Fe-KLTO@rGO composite sample has an excellent specific capacity of 330 and 105 mAh g(-1) at a current density of 1 C (1 C = 175 mA g(-1)) and 50 C, respectively. In addition, the Fe-KLTO@rGO composite sample can carry out a long cycle of 3000 cycles at a rate of 50 C, and the specific capacity remains at 127 mAh g(-1).

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