Fundamentals, advances and challenges of transition metal compounds-based supercapacitors

Future smart battery and management: Advanced sensing from external to embedded multi-dimensional measurement

Abstract Structural behaviors of four MnO 2 allotropes are investigated by in situ synchrotron X-ray diffraction analyses upon charge/discharge cycling in LiCl and KCl aqueous media. During the anodic/cathodic scans of the 2D birnessite electrode, the interlayer spacing respectively extend/contract along the z direction by ∼0.2 A. This behavior is associated to electrostatic attractive forces between charged framework layers and hydrated electrolyte cations. In contrast, the oxidation/reduction of the 3D spinel electrode lead to the contraction/swelling of (1 1 1) crystalline planes by ∼0.05 A. Manganese–oxygen distance changes induced by Mn(III)/Mn(IV) redox reactions are assigned to such a mechanism. Structural characterizations are focused on the (0 0 2), (2 1 1), (1 1 0) and (2 0 0) planes for MnO 2 cryptomelane, while (0 0 2) and (2 0 0) planes for MnO 2 OMS-5. The 1D cryptomelane and OMS-5 electrodes also exhibit contraction/swelling processes of their structures upon discharge/charge cycling associated to deintercalation/intercalation of hydrated electrolyte cations in their channels, respectively, driven by size/steric constraints.

http://ma.ecsdl.org/content/MA2011-02/11/486.full.pdf

Charge Storage Mechanisms in MnO2-Based Electrochemical Capacitors

Structure and functionality design of novel carbon and faradaic electrode materials for high-performance capacitive deionization

Renewable biomass-derived carbons for electrochemical capacitor applications

A self-healing hydrogel electrolyte for flexible solid-state supercapacitors

Utilizing human hair for solid-state flexible fiber-based asymmetric supercapacitors

Self N-Doped Porous Interconnected Carbon Nanosheets Material for Supercapacitors

High-performance asymmetric supercapacitor assembled with three-dimensional, coadjacent graphene-like carbon nanosheets and its composite

High‐performance all‐solid‐state supercapacitor with binder‐free binary transition metal sulfide array as cathode

Junwei Gong

Papers

A self-healing hydrogel electrolyte for flexible solid-state supercapacitors

Utilizing human hair for solid-state flexible fiber-based asymmetric supercapacitors

Self N-Doped Porous Interconnected Carbon Nanosheets Material for Supercapacitors

High-performance asymmetric supercapacitor assembled with three-dimensional, coadjacent graphene-like carbon nanosheets and its composite

High‐performance all‐solid‐state supercapacitor with binder‐free binary transition metal sulfide array as cathode