Ever-Increasing Pseudocapacitance in RGO–MnO–RGO Sandwich Nanostructures for Ultrahigh-Rate Lithium Storage

Tianzhi Yuan, Yinzhu Jiang, Wenping Sun, Xiang Bo, Yong Li, Mi Yan, Ben Xu, Shixue Dou

Research output: Contribution to journalArticlepeer-review

193 Citations (Scopus)
5 Downloads (Pure)

Abstract

Lithium ion batteries have attained great success in commercialization owing to their high energy density. However, the relatively delaying discharge/charge severely hinders their high power applications due to intrinsically diffusion-controlled lithium storage of the electrode. This study demonstrates an ever-increasing surface redox capacitive lithium storage originating from an unique microstructure evolution during cycling in a novel RGO–MnO–RGO sandwich nanostructure. Such surface pseudocapacitance is dynamically in equilibrium with diffusion-controlled lithium storage, thereby achieving an unprecedented rate capability (331.9 mAh g−1 at 40 A g−1, 379 mAh g−1 after 4000 cycles at 15 A g−1) with outstanding cycle stability. The dynamic combination of surface and diffusion lithium storage of electrodes might open up possibilities for designing high-power lithium ion batteries.
Original languageEnglish
Pages (from-to)2198-2206
JournalAdvanced Functional Materials
Volume26
Issue number13
Early online date19 Feb 2016
DOIs
Publication statusPublished - 5 Apr 2016

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