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A Nonaqueous Potassium‐Based Battery–Supercapacitor Hybrid Device
Author(s) -
Fan Ling,
Lin Kairui,
Wang Jue,
Ma Ruifang,
Lu Bingan
Publication year - 2018
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201800804
Subject(s) - supercapacitor , materials science , anode , battery (electricity) , electrolyte , cathode , power density , potassium , energy storage , potassium ion battery , energy density , carbon fibers , pulsed power , dimethoxyethane , chemical engineering , electrode , electrochemistry , electrical engineering , lithium vanadium phosphate battery , power (physics) , voltage , engineering physics , composite material , chemistry , metallurgy , physics , quantum mechanics , composite number , engineering
A low cost nonaqueous potassium‐based battery–supercapacitor hybrid device (BSH) is successfully established for the first time with soft carbon as the anode, commercialized activated carbon as the cathode, and potassium bis(fluoro‐slufonyl)imide in dimethyl ether as the electrolyte. This BSH reconciles the advantages of potassium ion batteries and supercapacitors, achieving a high energy density of 120 W h kg −1 , a high power density of 599 W kg −1 , a long cycle life of 1500 cycles, and an ultrafast charge/slow discharge performance (energy density and power density are calculated based on the total mass of active materials in the anode and cathode). This work demonstrates a great potential of applying the nonaqueous BSH for low cost electric energy storage systems.