Stable Supercapacity of Binder-Free TiO2(B) Epitaxial Electrodes for All-Solid-State Nanobatteries

Dongha Kim; Jingyeong Jeon; Joon Deok Park; Xiao Guang Sun; Xiang Gao; Ho Nyung Lee; Judith L. MacManus-Driscoll; Deok Hwang Kwon; Shinbuhm Lee

doi:10.1021/acs.nanolett.3c00596

Stable Supercapacity of Binder-Free TiO₂(B) Epitaxial Electrodes for All-Solid-State Nanobatteries

Dongha Kim, Jingyeong Jeon, Joon Deok Park, Xiao Guang Sun, Xiang Gao, Ho Nyung Lee, Judith L. MacManus-Driscoll, Deok Hwang Kwon, Shinbuhm Lee

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

Owing to its pseudocapacitive, unidimensional, rapid ion channels, TiO₂(B) is a promising material for application to battery electrodes. In this study, we align these channels by epitaxially growing TiO₂(B) films with the assistance of an isostructural VO₂(B) template layer. In a liquid electrolyte, binder-free TiO₂(B) epitaxial electrodes exhibit a supercapacity near the theoretical value of 335 mA h g^-1 and an excellent charge-discharge reproducibility for ≥200 cycles, which outperform those of other TiO₂(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.

Original language	English
Pages (from-to)	6815-6822
Number of pages	8
Journal	Nano Letters
Volume	23
Issue number	15
DOIs	https://doi.org/10.1021/acs.nanolett.3c00596
State	Published - Aug 9 2023

Funding

This work was supported by the R&D programs of the National Research Foundation of Korea funded by the Ministry of Science and ICT (Projects NRF-2021M3F3A2A03015439, NRF-2021R1C1C1005042, and NRF-2018R1A5A1025511). This work was also partially supported by the DGIST R&D program of the Ministry of Science and ICT of Korea (Projects 23-HRHR+-05, 22-CoE-NT-02, and 23-SENS-01). D.-H.K. acknowledges Institutional Research Program of the Korea Institute of Science and Technology (2E32574). S.L. and J.L.M.-D. thank Trinity College at Cambridge for partial support. J.L.M.-D. acknowledges GRant EP/T005394/1 FutureCat: The Faraday Institution Future Cathode Project, the ERC ADG Grant EU-H2020-ERC-ADG 882929, and the Royal Academy of Engineering Grant CIET181924. The work at ORNL was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences, and Engineering Division.

Funders	Funder number
Faraday Institution Future Cathode Project	EU-H2020-ERC-ADG 882929
Trinity College at Cambridge
U.S. Department of Energy
Office of Science
Basic Energy Sciences
Division of Materials Sciences and Engineering
Royal Academy of Engineering	CIET181924
Ministry of Science, ICT and Future Planning	NRF-2021M3F3A2A03015439, NRF-2021R1C1C1005042, 22-CoE-NT-02, 23-HRHR+-05, NRF-2018R1A5A1025511, 23-SENS-01
Korea Institute of Science and Technology	2E32574
National Research Foundation of Korea
Daegu Gyeongbuk Institute of Science and Technology

Keywords

TiO(B)
all-solid-state nanobattery
electrode
long retention
pseudocapacitive intercalation
supercapacity
templated epitaxy

Access to Document

10.1021/acs.nanolett.3c00596

Cite this

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title = "Stable Supercapacity of Binder-Free TiO2(B) Epitaxial Electrodes for All-Solid-State Nanobatteries",

abstract = "Owing to its pseudocapacitive, unidimensional, rapid ion channels, TiO2(B) is a promising material for application to battery electrodes. In this study, we align these channels by epitaxially growing TiO2(B) films with the assistance of an isostructural VO2(B) template layer. In a liquid electrolyte, binder-free TiO2(B) epitaxial electrodes exhibit a supercapacity near the theoretical value of 335 mA h g-1 and an excellent charge-discharge reproducibility for ≥200 cycles, which outperform those of other TiO2(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.",

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AU - Jeon, Jingyeong

AU - Park, Joon Deok

AU - Sun, Xiao Guang

AU - Gao, Xiang

AU - Lee, Ho Nyung

AU - MacManus-Driscoll, Judith L.

AU - Kwon, Deok Hwang

AU - Lee, Shinbuhm

PY - 2023/8/9

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AB - Owing to its pseudocapacitive, unidimensional, rapid ion channels, TiO2(B) is a promising material for application to battery electrodes. In this study, we align these channels by epitaxially growing TiO2(B) films with the assistance of an isostructural VO2(B) template layer. In a liquid electrolyte, binder-free TiO2(B) epitaxial electrodes exhibit a supercapacity near the theoretical value of 335 mA h g-1 and an excellent charge-discharge reproducibility for ≥200 cycles, which outperform those of other TiO2(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.

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