High energy Li-ion capacitors using two-dimensional TiSe0.6S1.4 as insertion host

Apoorva Chaturvedi; Peng Hu; Christian Kloc; Yun Sung Lee; Vanchiappan Aravindan; Srinivasan Madhavi

doi:10.1039/c7ta04470d

High energy Li-ion capacitors using two-dimensional TiSe_0.6S_1.4 as insertion host

Apoorva Chaturvedi, Peng Hu, Christian Kloc^*, Yun Sung Lee, Vanchiappan Aravindan, Srinivasan Madhavi

^*Corresponding author for this work

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

36 Citations (Scopus)

Abstract

A remarkable improvement in energy density was found using Se-substituted two-dimensional TiS₂ (TiSe_0.6S_1.4) as the insertion matrix in a Li-ion capacitor (LIC) assembly with activated carbon (AC) as the counter electrode. Chemical vapor transport was successfully used to synthesize high quality TiSe_0.6S_1.4 with near-100% crystallinity and subsequently employed as a battery component in LICs. Prior to LIC fabrication, the Li-insertion properties were assessed in single-electrode configuration with metallic Li. Single-electrode performance is crucial for adjusting the mass loading of AC and TiSe_0.6S_1.4 to realize the maximum energy density. Accordingly, an AC/TiSe_0.6S_1.4-based LIC delivered an energy density of ∼50 W h kg^-1 with a good cyclability of 5000 cycles. Few undesirable side reactions with the electrolyte counterpart were observed for TiSe_0.6S_1.4, as supported by the impedance measurements.

Original language	English
Pages (from-to)	19819-19825
Number of pages	7
Journal	Journal of Materials Chemistry A
Volume	5
Issue number	37
DOIs	https://doi.org/10.1039/c7ta04470d
Publication status	Published - 2017
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2017 The Royal Society of Chemistry.

ASJC Scopus Subject Areas

General Chemistry
Renewable Energy, Sustainability and the Environment
General Materials Science

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1039/c7ta04470d

Cite this

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title = "High energy Li-ion capacitors using two-dimensional TiSe0.6S1.4 as insertion host",

abstract = "A remarkable improvement in energy density was found using Se-substituted two-dimensional TiS2 (TiSe0.6S1.4) as the insertion matrix in a Li-ion capacitor (LIC) assembly with activated carbon (AC) as the counter electrode. Chemical vapor transport was successfully used to synthesize high quality TiSe0.6S1.4 with near-100% crystallinity and subsequently employed as a battery component in LICs. Prior to LIC fabrication, the Li-insertion properties were assessed in single-electrode configuration with metallic Li. Single-electrode performance is crucial for adjusting the mass loading of AC and TiSe0.6S1.4 to realize the maximum energy density. Accordingly, an AC/TiSe0.6S1.4-based LIC delivered an energy density of ∼50 W h kg-1 with a good cyclability of 5000 cycles. Few undesirable side reactions with the electrolyte counterpart were observed for TiSe0.6S1.4, as supported by the impedance measurements.",

author = "Apoorva Chaturvedi and Peng Hu and Christian Kloc and Lee, {Yun Sung} and Vanchiappan Aravindan and Srinivasan Madhavi",

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year = "2017",

doi = "10.1039/c7ta04470d",

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volume = "5",

pages = "19819--19825",

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T1 - High energy Li-ion capacitors using two-dimensional TiSe0.6S1.4 as insertion host

AU - Chaturvedi, Apoorva

AU - Hu, Peng

AU - Kloc, Christian

AU - Lee, Yun Sung

AU - Aravindan, Vanchiappan

AU - Madhavi, Srinivasan

PY - 2017

Y1 - 2017

N2 - A remarkable improvement in energy density was found using Se-substituted two-dimensional TiS2 (TiSe0.6S1.4) as the insertion matrix in a Li-ion capacitor (LIC) assembly with activated carbon (AC) as the counter electrode. Chemical vapor transport was successfully used to synthesize high quality TiSe0.6S1.4 with near-100% crystallinity and subsequently employed as a battery component in LICs. Prior to LIC fabrication, the Li-insertion properties were assessed in single-electrode configuration with metallic Li. Single-electrode performance is crucial for adjusting the mass loading of AC and TiSe0.6S1.4 to realize the maximum energy density. Accordingly, an AC/TiSe0.6S1.4-based LIC delivered an energy density of ∼50 W h kg-1 with a good cyclability of 5000 cycles. Few undesirable side reactions with the electrolyte counterpart were observed for TiSe0.6S1.4, as supported by the impedance measurements.

AB - A remarkable improvement in energy density was found using Se-substituted two-dimensional TiS2 (TiSe0.6S1.4) as the insertion matrix in a Li-ion capacitor (LIC) assembly with activated carbon (AC) as the counter electrode. Chemical vapor transport was successfully used to synthesize high quality TiSe0.6S1.4 with near-100% crystallinity and subsequently employed as a battery component in LICs. Prior to LIC fabrication, the Li-insertion properties were assessed in single-electrode configuration with metallic Li. Single-electrode performance is crucial for adjusting the mass loading of AC and TiSe0.6S1.4 to realize the maximum energy density. Accordingly, an AC/TiSe0.6S1.4-based LIC delivered an energy density of ∼50 W h kg-1 with a good cyclability of 5000 cycles. Few undesirable side reactions with the electrolyte counterpart were observed for TiSe0.6S1.4, as supported by the impedance measurements.

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