Gradient-Heterogeneous Lithium/Lithium-Magnesium Alloy for a Highly Stable Lithium Metal Anode
文献类型： 外文期刊
作者： Shuai, Yi 1 ; Hu, Yilong 2 ; Geng, Lan 3 ; Lou, Jin 4 ; Zhou, Jingan 3 ; Zhang, Limin 3 ; Li, Ming 2 ; Su, Changqing 3 ; Lu, Jiming 3 ; Wu, Yingpeng 1 ;
作者机构： 1.Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chem Biosensing & Chemometr, Changsha 410082, Peoples R China
2.Hunan Acad Agr Sci, Hunan Agr Equipment Res Inst, Changsha 410083, Peoples R China
3.Hunan Univ Technol & Business, Res Inst New Energy & Novel Energy Storage, Sch Resources & Environm, Changsha 410083, Peoples R China
4.China Southern Power Grid Technol Co Ltd, Guangzhou 510170, Peoples R China
关键词： lithium metal battery; gradient-heterogeneous alloy; lithium dendrites; Mg powder; Li-Mgalloy
期刊名称：ACS APPLIED MATERIALS & INTERFACES （ 影响因子：8.2； 五年影响因子：8.5 ）
ISSN： 1944-8244
年卷期： 2025 年 17 卷 23 期
页码：
收录情况： SCI
摘要： The lithium metal anode is considered a promising anode material due to its high specific capacity. However, the high reactivity and nonuniform deposition of Li metal pose significant challenges to the advancement of Li metal batteries. In this study, we introduce a straightforward and efficient approach to fabricate a heterogeneous Li/Li-Mg alloy anode with an Mg gradient distribution. Compared with homogeneous Li-Mg alloys, gradient-heterogeneous Li/Li-Mg alloys can offer a higher electrochemical activity surface area. Besides, the rich-Li alloy on the surface of alloy particles adeptly prevents the passivation effect, and the interior-rich Mg alloy guarantees the structural stability of the electrode. The symmetrical cell utilizing the gradient-heterogeneous Li/Li-Mg alloy exhibits stable cycling performance exceeding 7000 h. When paired with a SPAN cathode, the full cell retains 95% of its reversible capacity over 500 cycles. This study presents a straightforward and efficient approach to further the development of Li metal batteries.
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