期刊
ACS APPLIED ENERGY MATERIALS
卷 3, 期 12, 页码 11713-11723出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.0c01714
关键词
solid-state electrolyte; anode-free; ultrathin coating; ionic conductivity; dendrite-free
资金
- Ministry of Science and Technology of Taiwan [MOST 109-2639-E-011-001-ASP, 108-3116-F-011-001-CC1, 108-2627-M-011-001-, 107-2923-E-011-002, 107-2119-M-002-033-, 106-2923-E 011-005, 106-2221-E-011-125-MY3]
- Ministry of Education of Taiwan (U2RSC program) [MOE 1080059]
- Taiwan's Deep Decarbonization Pathways toward a Sustainable Society Project from MOE [AS-KPQ-106-DDPP, 1080059]
The low ionic conductivity, thermal stability and incompatibility of pellet-like solid-state electrolytes lead to low cycling performance in anode-free lithium metal batteries. Herein, we report an effective and feasible composite solid electrolyte-designing approach using the garnet (Li6.75La3Zr1.75Ta0.25O12, LLZTO)-polymer composite electrolyte (LLZTO/PEO-CPE) laminated on both the anode and cathode surfaces with an ultrathin thickness of 7-10 mu m by spin coating method. It is found that the LLZTO/PEO-CPE exhibits a high ionic conductivity of about 4.76 x 10(-4) S/cm at room temperature, excellent thermal stability, and good compatibility. Moreover, it simplifies the preparation of solid electrolytes and reduces the interfacial and grain boundary resistances for ion transfer. The use of both anode and cathode laminating enables dendrite-free lithium plating on copper with a high average coulombic efficiency and cycling stability of 98.8 and 41.2%, respectively, after the 65 cycles at 0.2 mA/cm(2) and 55 degrees C in an anode-free battery. This work provides a new design of solid-state electrolytes (SSEs) to achieve safe and dendrite-free anode-free batteries.
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