Toward garnet electrolyte–based Li metal batteries: An ultrathin, highly effective, artificial solid-state electrolyte/metallic Li interface
Kun Kelvin Fu,Yunhui Gong,Boyang Liu,Yizhou Zhu,Shaomao Xu,Yonggang Yao,Wei Luo,Chengwei Wang,Steven D. Lacey,Jiaqi Dai,Yanan Chen,Yifei Mo,Eric D. Wachsman,Liangbing Hu +13 more
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TLDR
New ways to address the garnet SSE wetting issue against Li and get more stable cell performances based on the hybrid electrolyte system for Li-ion, Li-sulfur, and Li-oxygen batteries toward the next generation of Li metal batteries are provided.Abstract:
Solid-state batteries are a promising option toward high energy and power densities due to the use of lithium (Li) metal as an anode. Among all solid electrolyte materials ranging from sulfides to oxides and oxynitrides, cubic garnet-type Li7La3Zr2O12 (LLZO) ceramic electrolytes are superior candidates because of their high ionic conductivity (10-3 to 10-4 S/cm) and good stability against Li metal. However, garnet solid electrolytes generally have poor contact with Li metal, which causes high resistance and uneven current distribution at the interface. To address this challenge, we demonstrate a strategy to engineer the garnet solid electrolyte and the Li metal interface by forming an intermediary Li-metal alloy, which changes the wettability of the garnet surface (lithiophobic to lithiophilic) and reduces the interface resistance by more than an order of magnitude: 950 ohm·cm2 for the pristine garnet/Li and 75 ohm·cm2 for the surface-engineered garnet/Li. Li7La2.75Ca0.25Zr1.75Nb0.25O12 (LLCZN) was selected as the solid-state electrolyte (SSE) in this work because of its low sintering temperature, stabilized cubic garnet phase, and high ionic conductivity. This low area-specific resistance enables a solid-state garnet SSE/Li metal configuration and promotes the development of a hybrid electrolyte system. The hybrid system uses the improved solid-state garnet SSE Li metal anode and a thin liquid electrolyte cathode interfacial layer. This work provides new ways to address the garnet SSE wetting issue against Li and get more stable cell performances based on the hybrid electrolyte system for Li-ion, Li-sulfur, and Li-oxygen batteries toward the next generation of Li metal batteries.read more
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Toward Safe Lithium Metal Anode in Rechargeable Batteries: A Review.
TL;DR: This review presents a comprehensive overview of the lithium metal anode and its dendritic lithium growth, summarizing the theoretical and experimental achievements and endeavors to realize the practical applications of lithium metal batteries.
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Guidelines and trends for next-generation rechargeable lithium and lithium-ion batteries.
TL;DR: This review summarizes the current trends and provides guidelines towards achieving next-generation rechargeable Li and Li-ion batteries with higher energy densities, better safety characteristics, lower cost and longer cycle life by addressing batteries using high-voltage cathodes, metal fluoride electrodes, chalcogen electrodes, Li metal anodes, high-capacity anodes as well as useful electrolyte solutions.
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Promises, Challenges, and Recent Progress of Inorganic Solid-State Electrolytes for All-Solid-State Lithium Batteries
TL;DR: A survey of emerging SSEs is presented, a perspective on the current challenges and opportunities is provided, and suggestions for future research directions for S SEs and ASSLBs are suggested.
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An anion-immobilized composite electrolyte for dendrite-free lithium metal anodes
Chen-Zi Zhao,Xue-Qiang Zhang,Xin-Bing Cheng,Rui Zhang,Rui Xu,Peng-Yu Chen,Hong-Jie Peng,Jia-Qi Huang,Qiang Zhang +8 more
TL;DR: This work realizes a dendrite-free Li metal anode by introducing an anion-immobilized composite solid electrolyte, where anions are tethered to polymer chains and ceramic particles to inhibit lithium dendrites and construct safe batteries.
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Surface Chemistry Mechanism of Ultra-Low Interfacial Resistance in the Solid-State Electrolyte Li7La3Zr2O12
Asma Sharafi,Eric Kazyak,Andrew L. Davis,Seung Ho Yu,Travis Thompson,Donald J. Siegel,Neil P. Dasgupta,Jeff Sakamoto +7 more
TL;DR: In this paper, the impact of surface chemistry on the interfacial resistance between the Li7La3Zr2O12 (LLZO) solid-state electrolyte and a metallic Li electrode is revealed.
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