Статья

A Bifuctional Presodiation Reagent for Hard Carbon Anodes Enhancing Performance of Sodium-Ion Batteries

Xiaoyu GaoSchool of Chemistry and Chemical Engineering, Shanghai Electrochemical Energy Devices Research Center, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of ChinaYukun SunSchool of Chemistry and Chemical Engineering, Shanghai Electrochemical Energy Devices Research Center, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of ChinaBowen HeSchool of Chemistry and Chemical Engineering, Shanghai Electrochemical Energy Devices Research Center, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of ChinaYanna NuLiSchool of Chemistry and Chemical Engineering, Shanghai Electrochemical Energy Devices Research Center, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of ChinaJiulin WangSchool of Chemistry and Chemical Engineering, Shanghai Electrochemical Energy Devices Research Center, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of ChinaJun YangSchool of Chemistry and Chemical Engineering, Shanghai Electrochemical Energy Devices Research Center, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China

2024en

ABI

Аннотация

As the benchmark anode material for sodium-ion batteries, hard carbon (HC) is still confronted by unsatisfactory initial Coulombic efficiency and an unstable solid electrolyte interphase (SEI), which degrade the energy density and cycling performance. Herein, we demonstrate the first-time application of sodium alkoxyaluminum hydride (RA) as a bifunctional presodiation reagent for the HC electrode. By driving the homogeneous accommodation of Na into the HC electrode and concurrently inducing the formation a passivative Al2O3 nanolayer, electrolyte decomposition on the HC anode surface and consumption of active Na are substantially alleviated, resulting in higher energy density and cycling reversibility of a Na3V2(PO4)3||HC full cell. In addition, the in situ surface modification of a passivative Al2O3 nanolayer also mitigates the sensitivity of the presodiated HC to dry air. This work highlights a bifunctional reagent realizing in situ HC anode surface modification and Na compensation toward long-lifetime sodium-ion batteries with higher energy density.

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Идентификаторы

DOI: 10.1021/acsenergylett.4c00314

Цитирования и источники

Цитирований: 2Использованных источников: 0

Показатели — AkademScholar