In-situ continuous hydrothermal synthesis of TiO2 nanoparticles on conductive N-doped MXene nanosheets for binder-free li-ion battery anodes
| Autor: | Steven Dunn, Suela Kellici, Uthman Alli, Seamus Killian, Kieran McCarthy, David J. Morgan, Nicholas P. Power, Ioan-Alexandru Baragau, Tadhg Kennedy |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Battery (electricity)
Materials science General Chemical Engineering General Chemistry Electrochemistry MXene nitrogen-doping continuous hydrothermal flow synthesis binder-free electrode processing Industrial and Manufacturing Engineering Energy storage Anode Chemical engineering Environmental Chemistry Hydrothermal synthesis Specific energy MXenes Faraday efficiency |
| ISSN: | 1385-8947 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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