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In-situ continuous hydrothermal synthesis of TiO2 nanoparticles on conductive N-doped MXene nanosheets for binder-free li-ion battery anodes

Alli, Uthman, McCarthy, Kieran, Baragau, Ioan-Alexandru, Power, Nicholas P., Morgan, David J., Dunn, Steven, Killian, Seamus, Kennedy, Tadhg and Kellici, Suela 2022. In-situ continuous hydrothermal synthesis of TiO2 nanoparticles on conductive N-doped MXene nanosheets for binder-free li-ion battery anodes. Chemical Engineering Journal 430 (4) , 132976. 10.1016/j.cej.2021.132976
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Abstract

Anode materials are key to determining the energy density, cyclability and of life recyclability for Li-ion energy storage systems. High surface area materials, such as MXenes, can be manufactured with improved electrochemical properties that remove the need for polymeric binders or hazardous chemicals that pose a challenge to recycle Li-ion batteries. However, there remains a challenge to produce Li-ion anode materials that are binder free and poses energy storage characteristics that match the current carbon-based electrodes. Here we show the synthesis of N-doped MXene-TiO2 hybrid anode materials using an aqueous route. N-doped TiO2-MXene was modified using a single step continuous hydrothermal process. Capacity tests indicate an improvement from the initial specific energy capacity of 305 mAhg−1 to 369 mAhg−1 after 100 cycles at a charge rate of 0.1 C and a Coulombic efficiency of 99.7%. This compares to 252 mAhg−1 for the unmodified MXene which exhibited significant capacity fade to 140 mAhg−1. The ability to manufacture a Li-ion anode that does not require toxic chemicals for processing into an electrode and exhibits good energy storage characteristics in a binder free system is a significant step forward for energy storage applications.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Cardiff Catalysis Institute (CCI)
Publisher: Elsevier
ISSN: 1385-8947
Funders: EPSRC Grand Challenge fund
Date of First Compliant Deposit: 28 October 2021
Date of Acceptance: 9 October 2021
Last Modified: 23 Dec 2021 16:20
URI: http://orca.cardiff.ac.uk/id/eprint/145135

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