Construction of V<sub>2</sub>O<sub>5</sub>@MXene Cathodes toward a High Specific Capacity Aqueous Aluminum-Ion Battery.
basic_science · Level V
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- Record sourced from PubMed, PMID 38973706.
- Also identified by DOI 10.1021/acs.nanolett.4c01363.
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Abstract
Aqueous aluminum-ion batteries (AAIBs) are considered a strong candidate for the new generation of energy storage devices. The lack of suitable cathode materials has been a bottleneck factor hindering the future development of AAIBs. In this work, we design and construct a highly effective cathode with dual morphologies. Two-dimensional (2D) layered MXene materials possessed good conductivity and hydrophilicity, which are used as the substrates to deposit rod-shaped vanadium oxides (V<sub>2</sub>O<sub>5</sub>) to form a three-dimensional (3D) cathode. The cathode design provides a strong boost for the rapid electrochemical activities of rod-shaped V<sub>2</sub>O<sub>5</sub> by embedding/extracting both protons (H<sup>+</sup>) and aluminum-ion (Al<sup>3+</sup>). As a result, the V<sub>2</sub>O<sub>5</sub>@MXene cathode based AAIB delivers an ultrahigh initial specific capacity of 626 mAh/g at 0.1 A/g with a stable cycle performance up to 100 cycles. This work is a breakthrough for the development of cathode materials for AAIBs.