Abstract
Powdered and fibrous Li2FeSiO4/C (LFS/C) composites with similar carbon content were synthesized by traditional solid-state route and electrospinning technique, respectively, for investigating initial aqueous super-capacitive mechanisms. The relationship between the scan rate and response current revealed their storage mechanisms, indicating that the LFS/C-Fiber displays more capacitive contribution to the total energy compared to that of LFS/C-Powder. The improved capacitive contribution is attributed to the morphological characteristics that partially increased the insertion contribution compared to that of the capacitive one. Furthermore, compared to the “Area Effect (EArea)”, the “Size Effect (ESize)” significantly increased the “real” capacitive part. Consequently, for the development of a high-rate and quick charge/dischargedevice, the morphological characteristic of synthesized composites should be considered as an essential factor.
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