Carbon-Coated Electrospun V2O5 Nanofibers as Photoresponsive Cathode for Lithium-Ion Batteries

Wilhelm, Michael ORCID: 0000-0002-4764-6955, Adam, Ruth, Bhardwaj, Aman, Neumann, Iuliia, Cho, Sung Hun, Yamada, Yuki ORCID: 0000-0002-7191-7129, Sekino, Tohru ORCID: 0000-0002-6605-9166, Tao, Jianming ORCID: 0000-0003-0128-5805, Hong, Zhensheng, Fischer, Thomas and Mathur, Sanjay . Carbon-Coated Electrospun V2O5 Nanofibers as Photoresponsive Cathode for Lithium-Ion Batteries. Adv. Eng. Mater.. WEINHEIM: WILEY-V C H VERLAG GMBH. ISSN 1527-2648

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DOI:10.1002/adem.202200765

Abstract

Photo-rechargeable batteries represent a synergistic concept that integrates both energy harvesting and energy storage modalities based on dual-functional materials. Electrospun vanadium oxide nanofibers (VNFs) seamlessly coated with conductive carbon (VNF-C-120) as dual-action cathode materials for photo-rechargeable lithium-ion batteries (LIBs) are reported. The materials deliver a high discharge capacity of 160 mAh g(-1), which could be increased up to 184 mAh g(-1) (C rate of 0.75) under light illumination that confirmed the photoresponsive behavior. Long-term stability tests (300 cycles at 0.75C) and the post-mortem analysis show that besides being a conductive sheath, the carbon coating is also essential in retaining the structural and morphological stability of V2O5 fibers, which was manifested in a higher capacity retention upon cycling compared to the non-carbon-coated VNF (43.85% capacity retention VNF and 61.13% capacity retention for VNF-C-120 after 300 cycles). In contrast, the pristine VNF electrode cannot reach 400 cycles, due to the failure of the cell, which, however, is prevented in cells operating with carbon-coated electrodes. Further, the photo-rechargeability of the cell is demonstrated under a UV lamp that delivered an overall conversion efficiency of 4.24% for VNF and 5.07% for the VNF-C-120.

Item Type:

Journal Article

Creators:

Creators	Email	ORCID	ORCID Put Code
Wilhelm, Michael	UNSPECIFIED	orcid.org/0000-0002-4764-6955	UNSPECIFIED
Adam, Ruth	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Bhardwaj, Aman	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Neumann, Iuliia	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Cho, Sung Hun	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Yamada, Yuki	UNSPECIFIED	orcid.org/0000-0002-7191-7129	UNSPECIFIED
Sekino, Tohru	UNSPECIFIED	orcid.org/0000-0002-6605-9166	UNSPECIFIED
Tao, Jianming	UNSPECIFIED	orcid.org/0000-0003-0128-5805	UNSPECIFIED
Hong, Zhensheng	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Fischer, Thomas	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Mathur, Sanjay	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED