Realizing the Multi-electron Reaction in the Na3V2(PO4)3 Cathode via Reversible Insertion of Dihydrogen Phosphate Anions
Source abstract
Abstract
Dual-ion battery (DIB) is an up-and-coming technology for the energy storage field. However, most of the current cathodes are still focused on the graphite hosts, which deliver a limited specific capacity. In this work, we demonstrated for the first time that H2PO4– can be used as the charge carrier for Na3V2(PO4)3 under an aqueous electrolyte, which enabled the V3+/V4+ and V4+/V5+ multielectron reactions in the Na3V2(PO4)3 electrode. The fabricated aqueous DIB delivers a high average voltage of ∼0.75 V (vs Ag/AgCl) and a high capacity of 280.7 mA h g–1. Moreover, the formed V5+-based novel cathode exhibits a capacity of 170.2 mA h g–1 in an organic sodium-ion battery. This study may open a new direction for fabricating high-voltage electrodes through the design of DIBs.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Advancements in Battery Materials · Transition Metal Oxide Nanomaterials · Gas Sensing Nanomaterials and Sensors
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Beijing Key Laboratory of Environmental Science and Engineering, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China
Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Funding
National Natural Science Foundation of China
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