Chinese Journal of Applied Chemistry ›› 2018, Vol. 35 ›› Issue (9): 1067-1075.DOI: 10.11944/j.issn.1000-0518.2018.09.180164

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Colloidal State of Active Cation and Its Limit for Electrochemical Energy Storage

CHEN Kunfeng,XUE Dongfeng()   

  1. State Key Laboratory of Rare Earth Resource Utilization,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China
  • Received:2018-05-09 Accepted:2018-05-15 Published:2018-09-01 Online:2018-08-06
  • Contact: XUE Dongfeng
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.21521092), the External Cooperation Program of BIC, Chinese Academy of Sciences(No.121522KYS820150009), the Jilin Provincial Science and Technology Development Program(No.20170101092JC)

Abstract:

Cation redox chemistry is the most important energy storage mechanism of electrochemical energy storage technology. How to utilize redox active cations efficiently and quickly is the key to the development of electrical storage technology with both high power density and high energy density. The cationic state in colloid state can form thermodynamic equilibrium state and non-equilibrium state with high reactivity and fast reaction kinetics. In this paper, the colloidal state and the electrochemical energy storage limit of redox active cations are introduced, and the energy storage mechanism and the construction of the active colloid ion electrode are described from viewpoint of thermodynamics and kinetics. Using the high specific surface area of colloid, high ion adsorption capacity, and charge ion gradient distribution, the creative colloid supercapacitor battery solves the problem that the existing electrochemical energy storage materials can not have both high energy and high power, and the new application direction of the colloid system is also opened up.

Key words: redox ions, supercapacitors, batteries, electrochemical energy storage, electroactive colloids