Zhang W, Tian H, Wang J, Sun H, Wang J, Huang W. Quinone Electrode for Long Lifespan Potassium-Ion Batteries Based on Ionic Liquid Electrolytes.
ACS APPLIED MATERIALS & INTERFACES 2022;
14:38887-38894. [PMID:
35975973 DOI:
10.1021/acsami.2c10852]
[Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
As a class of flexible and designable materials, organic electrode materials would greatly facilitate the progress of potassium-ion batteries (PIBs), especially when the dissolution issue is ameliorated. Ionic liquid electrolytes (ILEs) do not merely alleviate the dissolution of organic materials but provide reliable security. Herein, Pillar[5]quinone (P5Q) as the cathode of PIBs is demonstrated for the first time, and the electrochemical performance of two common ILEs is investigated. In the 0.3 M KFSI-PY13FSI electrolyte with better conductivity, the P5Q cathode maintains a large reversible capacity of 232 mAh g-1 (450 Wh kg-1) after 100 cycles at 0.2C at 1.2-4.0 V. When a current density of 2.0C is applied, the cell retains a capacity of 101 mAh g-1 (211 Wh kg-1) after 1000 cycles and 61 mAh g-1 (125 Wh kg-1) even over 5000 cycles. This research would inspire research on organic electrodes and advance the application of PIBs.
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