气候变化领域集成服务门户(CCPortal): In situ formation of a bifunctional interlayer enabled by a conversion reaction to initiatively prevent lithium dendrites in a garnet solid electrolyte

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DOI	10.1039/c8ee03390k
	In situ formation of a bifunctional interlayer enabled by a conversion reaction to initiatively prevent lithium dendrites in a garnet solid electrolyte
	Fu J.; Yu P.; Zhang N.; Ren G.; Zheng S.; Huang W.; Long X.; Li H.; Liu X.
发表日期	2019
ISSN	17545692
起始页码	1404
结束页码	1412
卷号	12 期号:4
英文摘要	Adopting inorganic solid electrolytes (ISEs) is a promising approach to assemble batteries using Li metal anodes because of their superior Li-ion conductivity and high mechanical strength. This approach greatly improves the energy density and the safety of batteries. However, lithium dendrites still can pierce the bare ISE because of inhomogeneous current distributions at interfaces, leading to serious short circuits. This work proposes to reduce the interfacial resistance and prevent lithium dendrite growth simultaneously through in situ formation of interlayers enabled by a conversion reaction of MoS2 layers coated on a bare Li6.5La3Zr1.5Ta0.5O12 (LLZO) pellet. The interfacial resistance is reduced to only 14 Ω cm2, with the overpotential decreasing notably. The critical current density of cells is improved from 0.7 mA cm-2 to 2.2 mA cm-2. Furthermore, short circuits are significantly suppressed above the critical current density with the potential diverging quickly. The cell can be recovered to some extent by applying an inverse potential for a short time. The comparison between XPS and XAS measurements reveals that the nanoscale thin MoS2 layer in contact with the Li anode can be converted into an interlayer composed of Mo and Li2S through the conversion reaction. The sluggish kinetics of the conversion reaction resulting from the poor electronic conductivity makes the in situ-formed interlayer kinetically stable, which can hinder further reaction of MoS2 with Li effectively. Moreover, the in situ reaction could suppress the local tip electric field effect efficiently and make the current distribution more even. This study provides a new strategy to optimize the interface of anodes by screening for more candidates which undergo a conversion reaction. © 2019 The Royal Society of Chemistry.
英文关键词	Anodes; Electric current distribution measurement; Electric field effects; Lanthanum compounds; Layered semiconductors; Lithium compounds; Lithium-ion batteries; Molybdenum compounds; Potentiometric sensors; Reaction kinetics; Solid electrolytes; Solid-State Batteries; Tantalum compounds; Zirconium compounds; Conversion reactions; Current distribution; Electronic conductivity; High mechanical strength; Inorganic solid electrolytes; Interfacial resistances; Li ion conductivities; Safety of batteries; Lithium; chemical reaction; electrolyte; energy efficiency; in situ measurement; lithium; reaction kinetics
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/189931
作者单位	State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences, Shanghai, 200050, China; School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China; Tianmu Lake Institute of Advanced Energy Storage Technologies, Liyang City, Jiangsu, 213300, China
推荐引用方式 GB/T 7714	Fu J.,Yu P.,Zhang N.,et al. In situ formation of a bifunctional interlayer enabled by a conversion reaction to initiatively prevent lithium dendrites in a garnet solid electrolyte[J],2019,12(4).
APA	Fu J..,Yu P..,Zhang N..,Ren G..,Zheng S..,...&Liu X..(2019).In situ formation of a bifunctional interlayer enabled by a conversion reaction to initiatively prevent lithium dendrites in a garnet solid electrolyte.Energy & Environmental Science,12(4).
MLA	Fu J.,et al."In situ formation of a bifunctional interlayer enabled by a conversion reaction to initiatively prevent lithium dendrites in a garnet solid electrolyte".Energy & Environmental Science 12.4(2019).