Investigation of Electrochemical Performance and Gas Swelling Behavior on Li4Ti5O12/Activated Carbon Lithium-Ion Capacitor with Acetonitrile-Based and Ester-Based Electrolytes

Lithium-ion capacitors (LICs) have gained significant attention due to the combination on the advantages of electric double-layer capacitors (EDLCs) and lithium-ion batteries (LIBs). Herein, the LIC pouch cell was fabricated by an activated carbon (AC) cathode and a Li4Ti<s...

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Autores principales:	Zhongxun An, Xueru Xu, Lingling Fan, Chongyang Yang, Jiaqiang Xu
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	lithium-ion capacitor (LIC) organic electrolyte lithium titanate (LTO) pouch cell gas swelling Electronics TK7800-8360
Acceso en línea:	https://doaj.org/article/779253c5b8d646faaf171a77313af31a
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spelling	oai:doaj.org-article:779253c5b8d646faaf171a77313af31a2021-11-11T15:38:30ZInvestigation of Electrochemical Performance and Gas Swelling Behavior on Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub>/Activated Carbon Lithium-Ion Capacitor with Acetonitrile-Based and Ester-Based Electrolytes10.3390/electronics102126232079-9292https://doaj.org/article/779253c5b8d646faaf171a77313af31a2021-10-01T00:00:00Zhttps://www.mdpi.com/2079-9292/10/21/2623https://doaj.org/toc/2079-9292Lithium-ion capacitors (LICs) have gained significant attention due to the combination on the advantages of electric double-layer capacitors (EDLCs) and lithium-ion batteries (LIBs). Herein, the LIC pouch cell was fabricated by an activated carbon (AC) cathode and a Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub> (LTO) anode. Two organic electrolytes (1 mol L<sup>−1</sup> LiBF<sub>4</sub>/acetonitrile (AN) and 1 mol L<sup>−1</sup> LiPF<sub>6</sub>/ ethylene carbonate (EC) + ethyl methyl carbonate (EMC) + dimethyl carbonate (DMC)) were chosen and the gas swelling behavior was studied. Compared with the ester-based LIC, the AN-based LIC displays higher energy density of 13.31 Wh kg<sup>−1</sup> at 11.4 W kg<sup>−1</sup> and even provides a value of 9.1 Wh kg<sup>−1</sup> at 1075 W kg<sup>−1</sup>. Because of the lower DC Resistance of 0.761 mΩ, the maximum power density of the AN-based LIC reaches 12.5 kW kg<sup>−1</sup>. The AN-based LIC delivers good stability with an energy retention of 88.3% after 900 cycles. It is discovered that the swelling behavior of AN-based LICs is more serious and the major component is H<sub>2</sub>. The difference of swelling behavior among the LICs, lithium nickel cobalt manganese oxide (NCM)/LTO LIB and AC/AC EDLC is proposed to be caused by the AC electrode and the interfacial reaction of LTO.Zhongxun AnXueru XuLingling FanChongyang YangJiaqiang XuMDPI AGarticlelithium-ion capacitor (LIC)organic electrolytelithium titanate (LTO)pouch cellgas swellingElectronicsTK7800-8360ENElectronics, Vol 10, Iss 2623, p 2623 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	lithium-ion capacitor (LIC) organic electrolyte lithium titanate (LTO) pouch cell gas swelling Electronics TK7800-8360
spellingShingle	lithium-ion capacitor (LIC) organic electrolyte lithium titanate (LTO) pouch cell gas swelling Electronics TK7800-8360 Zhongxun An Xueru Xu Lingling Fan Chongyang Yang Jiaqiang Xu Investigation of Electrochemical Performance and Gas Swelling Behavior on Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub>/Activated Carbon Lithium-Ion Capacitor with Acetonitrile-Based and Ester-Based Electrolytes
description	Lithium-ion capacitors (LICs) have gained significant attention due to the combination on the advantages of electric double-layer capacitors (EDLCs) and lithium-ion batteries (LIBs). Herein, the LIC pouch cell was fabricated by an activated carbon (AC) cathode and a Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub> (LTO) anode. Two organic electrolytes (1 mol L<sup>−1</sup> LiBF<sub>4</sub>/acetonitrile (AN) and 1 mol L<sup>−1</sup> LiPF<sub>6</sub>/ ethylene carbonate (EC) + ethyl methyl carbonate (EMC) + dimethyl carbonate (DMC)) were chosen and the gas swelling behavior was studied. Compared with the ester-based LIC, the AN-based LIC displays higher energy density of 13.31 Wh kg<sup>−1</sup> at 11.4 W kg<sup>−1</sup> and even provides a value of 9.1 Wh kg<sup>−1</sup> at 1075 W kg<sup>−1</sup>. Because of the lower DC Resistance of 0.761 mΩ, the maximum power density of the AN-based LIC reaches 12.5 kW kg<sup>−1</sup>. The AN-based LIC delivers good stability with an energy retention of 88.3% after 900 cycles. It is discovered that the swelling behavior of AN-based LICs is more serious and the major component is H<sub>2</sub>. The difference of swelling behavior among the LICs, lithium nickel cobalt manganese oxide (NCM)/LTO LIB and AC/AC EDLC is proposed to be caused by the AC electrode and the interfacial reaction of LTO.
format	article
author	Zhongxun An Xueru Xu Lingling Fan Chongyang Yang Jiaqiang Xu
author_facet	Zhongxun An Xueru Xu Lingling Fan Chongyang Yang Jiaqiang Xu
author_sort	Zhongxun An
title	Investigation of Electrochemical Performance and Gas Swelling Behavior on Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub>/Activated Carbon Lithium-Ion Capacitor with Acetonitrile-Based and Ester-Based Electrolytes
title_short	Investigation of Electrochemical Performance and Gas Swelling Behavior on Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub>/Activated Carbon Lithium-Ion Capacitor with Acetonitrile-Based and Ester-Based Electrolytes
title_full	Investigation of Electrochemical Performance and Gas Swelling Behavior on Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub>/Activated Carbon Lithium-Ion Capacitor with Acetonitrile-Based and Ester-Based Electrolytes
title_fullStr	Investigation of Electrochemical Performance and Gas Swelling Behavior on Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub>/Activated Carbon Lithium-Ion Capacitor with Acetonitrile-Based and Ester-Based Electrolytes
title_full_unstemmed	Investigation of Electrochemical Performance and Gas Swelling Behavior on Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub>/Activated Carbon Lithium-Ion Capacitor with Acetonitrile-Based and Ester-Based Electrolytes
title_sort	investigation of electrochemical performance and gas swelling behavior on li<sub>4</sub>ti<sub>5</sub>o<sub>12</sub>/activated carbon lithium-ion capacitor with acetonitrile-based and ester-based electrolytes
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/779253c5b8d646faaf171a77313af31a
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Investigation of Electrochemical Performance and Gas Swelling Behavior on Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub>/Activated Carbon Lithium-Ion Capacitor with Acetonitrile-Based and Ester-Based Electrolytes

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