Composite electrolytes of polyethylene oxides/garnets interfacially wetted by ionic liquid for room-temperature solid-state lithium battery

Recent Progress of Hybrid Solid‐State Electrolytes for Lithium Batteries

“…2018,24,[18293][18294][18295][18296][18297][18298][18299][18300][18301][18302][18303][18304][18305][18306] www.chemeurj.org 2018 Wiley-VCH Verlag GmbH &Co. KGaA, Weinheim mer electrolyte, achieving ar oom temperature conductivity of 1.7 10 À4 Scm À1 and al ithium transfer number of 0.39. Eur.J.…”

“…Guo and co-workersf abricated ap olymer-inorganic HSSE composed of Li-salt-free PEO and Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) with differentparticlesizes ( Figure 3a). [24] Similarly,g arnet-type Al-doped Li 6.75 La 3 Zr 1.75 Ta 0.25 O 12 (LLZTO) particles were dispersed in PEO matrix containing lithium bis-(trifluoromethylsulphonyl)imide (LiTFSI) to synthesize af lexible PEO-LiTFSI-LLZTO (PLL) HSSE by Zhang and co-workers. In addition, PEO/LLZTO HSSE containing nano-size LLZTO particles displayed conductivity nearly two orders of magnitude higher than those with micro-sizeo nes, signifying the importance of microscopics tructure and interphase in the HSSEs.I nt heir later work, as mall amount of ionic liquid was appliedt ow et the interphase betweenH SSE and electrodes.…”

“…In addition, PEO/LLZTO HSSE containing nano-size LLZTO particles displayed conductivity nearly two orders of magnitude higher than those with micro-sizeo nes, signifying the importance of microscopics tructure and interphase in the HSSEs.I nt heir later work, as mall amount of ionic liquid was appliedt ow et the interphase betweenH SSE and electrodes. [24] Similarly,g arnet-type Al-doped Li 6.75 La 3 Zr 1.75 Ta 0.25 O 12 (LLZTO) particles were dispersed in PEO matrix containing lithium bis-(trifluoromethylsulphonyl)imide (LiTFSI) to synthesize af lexible PEO-LiTFSI-LLZTO (PLL) HSSE by Zhang and co-workers. [6c] As shown in Figure 3c,a nionsi nP LL HSSE are immobilizedb y both the polymer matrix and active LLZTO fillers, leading to uniform distribution of space chargea nd lithium ions that enables dendrite-freel ithium deposition.…”

“…Chem. Eur.J.2018,24,[18293][18294][18295][18296][18297][18298][18299][18300][18301][18302][18303][18304][18305][18306] www.chemeurj.org2018 Wiley-VCH Verlag GmbH &Co. KGaA, Weinheim…”

Recent Advancements in Interface between Cathode and Garnet Solid Electrolyte for All Solid State Li-ion Batteries

“…LLZTO 膜结构遭到破坏, 电池结构稳定性恶化。清 华大学南策文课题组 [72] 将 PEO 同时引入到正极与 固体电解质中, 制备出了具有良好柔韧性的 PEO: In 2 O 5 Sn:LFP 复合正极与 PEO:Al-LLZTO 复合固体 电解质, 在复合正极与复合电解质间形成了无孔隙 的致密界面, 如图 6 所示。 以锂为负极, 组装成的全 固态电池具有 155 mAh·g -1 的高放电比容量, 在受 到恶劣条件(反复弯曲, 甚至在放电过程中切割成 小块)时仍能正常工作, 表现出优良的电化学性能 和物理稳定性。采用 PVDF 制备的石榴石型复合 电 解 质 也 能 够 有 效 改 善 正 极 与 电 解 质 之 间 的 界 面结构和界面接触性能 [73] , 如: 由 PVDF 基体和 Li 6.75 La 3 Zr 1.75 Ta 0.25 O 12 填料组成的柔性复合膜, 在 环境温度下表现出优异的电化学性能、机械性能和 图 6 含 15wt%聚合物的 LFP 复合阴极与 LLZTO 复合电解 质的界面 SEM 照片 [72] Fig. 6 SEM image of the interface between LFP composite cathode containing 15wt% polymer and the LLZTO composite electrolyte [72] [78] Fig. 7 Solid-state LFP or LFMP/Li cells using PEO/LLZTO@IL membranes [78]…”