当前位置：
X-MOL 学术
›
ACS Appl. Mater. Interfaces
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Tailoring the Surface of Natural Graphite with Functional Metal Oxides via Facile Crystallization for Lithium-Ion Batteries
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2022-06-23 , DOI: 10.1021/acsami.2c05583 Jun Won Lee 1 , So Yeun Kim 1 , Dong Young Rhee 1 , Sungmin Park 1 , Jae Yup Jung 1 , Min-Sik Park 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2022-06-23 , DOI: 10.1021/acsami.2c05583 Jun Won Lee 1 , So Yeun Kim 1 , Dong Young Rhee 1 , Sungmin Park 1 , Jae Yup Jung 1 , Min-Sik Park 1
Affiliation
|
Graphite is the most popular anode material for lithium-ion batteries (LIBs) owing to its high reversibility and stable cycling performance. With the rapid growth of the global electric vehicle (EV) market, it has become necessary to improve the quick-charge performance of graphite to reduce the charging time of LIBs. Therefore, from a structural viewpoint, it is crucial to control interfacial reactions and stabilize the surface of graphite to improve the sluggish interfacial kinetics. Herein, we propose a facile approach for integrating functional metal oxides on the surface of natural graphite (NG) via a surface-coating technique in combination with a facile-crystallization process. The functionality of the metal oxides, i.e., MoO2 and Fe3O4, on the surface of NG was thoroughly investigated based on various structural and electrochemical analyses. The results demonstrate that the metal oxides play critical roles in stabilizing the surface of NG and facilitating faster Li+ migration at the interface between NG and the electrolyte during cycling. In particular, the full cell configured with the c-Fe3O4-NG anode shows remarkably improved charging behavior (3 C charging–1 C discharging) without any significant loss of reversible capacity during 300 cycles. This study has conclusively established that tailoring the surface of NG with functional metal oxides would be a utilitarian way to improve the charging capability of NG. We are confident that the study results would provide utilitarian insights into the development of advanced LIBs for successful implementation in EV applications in the future.
中文翻译：
锂离子电池用功能性金属氧化物通过简易结晶定制天然石墨表面
石墨因其高可逆性和稳定的循环性能而成为最受欢迎的锂离子电池（LIB）负极材料。随着全球电动汽车（EV）市场的快速增长，提高石墨的快速充电性能以减少LIBs的充电时间已成为必要。因此，从结构的角度来看，控制界面反应并稳定石墨表面以改善缓慢的界面动力学至关重要。在此，我们提出了一种通过表面涂层技术结合简单结晶工艺将功能性金属氧化物整合到天然石墨（NG）表面的简便方法。金属氧化物的功能，即 MoO 2和 Fe 3 O 4, 基于各种结构和电化学分析，对 NG 的表面进行了彻底的研究。结果表明，金属氧化物在稳定 NG 表面和促进循环过程中 NG 和电解质之间的界面处更快的 Li +迁移方面发挥着关键作用。特别是，配置有 c-Fe 3 O 4的全电池-NG 阳极显示出显着改善的充电行为（3 C 充电 - 1 C 放电），在 300 次循环期间没有任何明显的可逆容量损失。本研究最终确定，用功能性金属氧化物定制 NG 表面将是提高 NG 充电能力的实用方法。我们相信，研究结果将为开发先进的 LIB 提供实用的见解，以便在未来成功实施 EV 应用。
更新日期：2022-06-23
中文翻译：
锂离子电池用功能性金属氧化物通过简易结晶定制天然石墨表面
石墨因其高可逆性和稳定的循环性能而成为最受欢迎的锂离子电池（LIB）负极材料。随着全球电动汽车（EV）市场的快速增长，提高石墨的快速充电性能以减少LIBs的充电时间已成为必要。因此，从结构的角度来看，控制界面反应并稳定石墨表面以改善缓慢的界面动力学至关重要。在此，我们提出了一种通过表面涂层技术结合简单结晶工艺将功能性金属氧化物整合到天然石墨（NG）表面的简便方法。金属氧化物的功能，即 MoO 2和 Fe 3 O 4, 基于各种结构和电化学分析，对 NG 的表面进行了彻底的研究。结果表明，金属氧化物在稳定 NG 表面和促进循环过程中 NG 和电解质之间的界面处更快的 Li +迁移方面发挥着关键作用。特别是，配置有 c-Fe 3 O 4的全电池-NG 阳极显示出显着改善的充电行为（3 C 充电 - 1 C 放电），在 300 次循环期间没有任何明显的可逆容量损失。本研究最终确定，用功能性金属氧化物定制 NG 表面将是提高 NG 充电能力的实用方法。我们相信，研究结果将为开发先进的 LIB 提供实用的见解，以便在未来成功实施 EV 应用。
京公网安备 11010802027423号