A Quasi-Solid-State Li-Ion Capacitor Based on Porous TiO2 Hollow Microspheres Wrapped with Graphene Nanosheets

Faxing Wang; Chun Wang; Yujuan Zhao; Zaichun Liu; Zheng Chang; Lijun Fu; Yusong Zhu; Yuping Wu; Dongyuan Zhao

doi:10.1002/smll.201602331

A Quasi-Solid-State Li-Ion Capacitor Based on Porous TiO₂ Hollow Microspheres Wrapped with Graphene Nanosheets

Small. 2016 Dec;12(45):6207-6213. doi: 10.1002/smll.201602331. Epub 2016 Sep 29.

Authors

Faxing Wang¹, Chun Wang², Yujuan Zhao², Zaichun Liu^{1

2}, Zheng Chang², Lijun Fu¹, Yusong Zhu¹, Yuping Wu^{1

2}, Dongyuan Zhao²

Affiliations

¹ College of Energy and Institute for Electrochemical Energy Storage, Nanjing Tech University, Jiangsu Province, Nanjing, 211816, China.
² Laboratory of Advanced Materials, Department of Chemistry & Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200433, China.

PMID: 27682599
DOI: 10.1002/smll.201602331

Abstract

The quasi-solid-state Li-ion capacitor is demonstrated with graphene nanosheets prepared by an electrochemical exfoliation as the positive electrode and the porous TiO₂ hollow microspheres wrapped with the same graphene nanosheets as the negative electrode, using a Li-ion conducting gel polymer electrolyte. This device may be the key to bridging the gap between conventional lithium-ion batteries and supercapacitors, meanwhile meeting the safety demands of electronic devices.

Keywords: Li-ion capacitors; TiO2; electrochemically exfoliated graphene; gel polymer electrolytes; hollow microspheres.