In Situ Alloying Strategy for Exceptional Potassium Ion Batteries

ACS Nano
Jue WangBingan Lu

Abstract

We report an in situ alloying strategy for obtaining homogeneous (Bi,Sb) alloy nanoparticles from (Bi,Sb)2S3 nanotubes for the exceptional anode of potassium ion batteries (KIBs). The operando X-ray diffraction results, along with transmission electron microscopy and energy-dispersive X-ray spectroscopy mappings, successfully reveal the phase evolution of this material, which is (Bi,Sb)2S3 → (Bi,Sb) → K(Bi,Sb) → K3(Bi,Sb) during the initial discharge and K3(Bi,Sb) → K(Bi,Sb) → (Bi,Sb) in the charging process. The in situ alloying strategy produces a synergistic effect and brings an outstanding electrochemical performance. It achieves ultrahigh discharge capacities of 611 mAh g-1 at 100 mA g-1 (0.135C) and 300 mAh g-1 at 1000 mA g-1 (1.35C) and retains a capacity as high as 353 mAh g-1 after 1000 cycles at 500 mA g-1 (0.675C) with a Coulombic efficiency close to 100%. In addition, the KIBs full cell, which is composed of this anode and a perylenetetracarboxylic dianhydride cathode, reaches an initial discharge capacity as high as 276 mAh g-1 at 500 mA g-1 and maintains 207 mAh g-1 after 100 cycles.

References

Nov 19, 2011·Science·Bruce DunnJean-Marie Tarascon
Apr 17, 2014·ACS Nano·Behdokht FarbodDavid Mitlin
Jul 22, 2015·Chemical Communications : Chem Comm·Yubao Zhao, Arumugam Manthiram
Aug 19, 2015·ACS Applied Materials & Interfaces·Hongshuai HouXiaobo Ji
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Feb 1, 2018·ACS Applied Materials & Interfaces·Junli WangKangmin Chen
Apr 1, 2018·Advanced Materials·Ling FanBingan Lu
Oct 27, 2018·Advanced Materials·Ling FanBingan Lu

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Citations

Apr 15, 2020·Chemistry, an Asian Journal·Yanan XuDan Li
Dec 18, 2020·ACS Applied Materials & Interfaces·Taohong WangBingan Lu
Dec 10, 2019·ACS Applied Materials & Interfaces·Jihui LangYongbing Tang
Nov 2, 2019·ACS Applied Materials & Interfaces·Qingfeng ZhangBingan Lu
Nov 16, 2019·ACS Applied Materials & Interfaces·Zhanyu LiFeiyu Kang

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