Stable Supercapacity of Binder-Free TiO<sub>2</sub>(B) Epitaxial Electrodes for All-Solid-State Nanobatteries.
basic_science · Level V
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- Record sourced from PubMed, PMID 37499099.
- Also identified by DOI 10.1021/acs.nanolett.3c00596.
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Abstract
Owing to its pseudocapacitive, unidimensional, rapid ion channels, TiO<sub>2</sub>(B) is a promising material for application to battery electrodes. In this study, we align these channels by epitaxially growing TiO<sub>2</sub>(B) films with the assistance of an isostructural VO<sub>2</sub>(B) template layer. In a liquid electrolyte, binder-free TiO<sub>2</sub>(B) epitaxial electrodes exhibit a supercapacity near the theoretical value of 335 mA h g<sup>-1</sup> and an excellent charge-discharge reproducibility for ≥200 cycles, which outperform those of other TiO<sub>2</sub>(B) nanostructures. For the all-solid-state configuration employing the LiPON solid electrolyte, excellent stability persists. Our findings suggest excellent potential for miniaturizing all-solid-state nanobatteries in self-powered integrated circuits.