We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Preparation, morphology and electrochemical performances of LiFePO-expanded graphite composites as the positive material for Li-ion capacitor application in aqueous neutral electrolyte.
- Authors
Li, Yawen; Fu, Dan; Zhang, Xugang; Qiu, Shen; Qin, Chuanli
- Abstract
LiFePO/expanded graphite (LFP/EG) composites were prepared by in situ sol-gel synthesis method. Li-ion capacitors (LICs) using LiNO aqueous electrolyte were assembled with LFP/EG composites as the positive electrode and active carbon as the negative electrode in order to study the possibility of LFP/EG composites as the positive electrode material for LIC application in aqueous neutral electrolyte. The results show quasi spherical LFP particles were homogeneously wrapped by EG film and embedded into EG sheets, which can form an effective 3D conductive network to improve conductivity and electrochemical performances of LFP/EG composites. Compared with LFP (93.41 F g), the optimized LFP/EG composite exhibits C of 326.23 F g at the scanning rate of 5 mV s. The optimized LIC exhibits the highest C of 53.31 F g at the current density of 200 mA g. The LFP/EG composite and Li-ion capacitor maintains 84.8 % and 84.6 % of the initial specific capacitance after 100 cycles, respectively.
- Subjects
LITHIUM phosphide; GRAPHITE composites; ELECTROCHEMICAL analysis; MICROSTRUCTURE; LITHIUM-ion batteries; ELECTROLYTES
- Publication
Journal of Materials Science: Materials in Electronics, 2016, Vol 27, Issue 5, p4417
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-016-4312-0