当前位置：
X-MOL 学术
›
Adv. Energy Mater.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
CO2-Assisted Induced Self-Assembled Aramid Nanofiber Aerogel Composite Solid Polymer Electrolyte for All-Solid-State Lithium-Metal Batteries
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2024-01-08 , DOI: 10.1002/aenm.202303527 Xinyu Da 1 , Jing Chen 1 , Yanyang Qin 1 , Jianyun Zhao 1 , Xin Jia 1 , Yuanjun Zhao 1 , Xuetian Deng 1 , Yanan Li 1 , Na Gao 1 , Yaqiong Su 1 , Qiang Rong 2 , Xiangpeng Kong 2 , Junqiao Xiong 2 , Xiaofei Hu 1 , Shujiang Ding 1 , Guoxin Gao 1
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2024-01-08 , DOI: 10.1002/aenm.202303527 Xinyu Da 1 , Jing Chen 1 , Yanyang Qin 1 , Jianyun Zhao 1 , Xin Jia 1 , Yuanjun Zhao 1 , Xuetian Deng 1 , Yanan Li 1 , Na Gao 1 , Yaqiong Su 1 , Qiang Rong 2 , Xiangpeng Kong 2 , Junqiao Xiong 2 , Xiaofei Hu 1 , Shujiang Ding 1 , Guoxin Gao 1
Affiliation
|
All-solid-state lithium metal batteries (ASSLMBs) hold great promise for the development of next-generation high-safety, high-energy-density lithium batteries, but still face the challenges of lithium dendrite growth and thickness. Herein, the ultrathin PEO-based composite solid polymer electrolyte (denoted as PAL) supported by a low-density self-supporting aramid nanofiber (ANF) aerogel framework is developed. The ANF aerogel obtained by a novel CO2-assisted induced self-assembly method has a well-designed bilayer structure with double cross-linking degree. Benefiting from the intermolecular interaction between ANFs and PEO, the PAL achieves an ultrathin thickness (20 µm) with excellent thermal stability and mechanical strength. Meanwhile, due to the modulation of ionic pathways by the functionalized ANF, the PAL achieves uniform lithium deposition without dendrites, resulting in stable long cycling (1400 h) for symmetric cells. Consequently, the Li|PAL|LiFePO4 (LFP) cell has excellent long-term cycling stability (1 C, >700 cycles, Coulombic efficiency > 99.8%) and fast charge/discharge performance (rate, 10 C). More practically, the Li|PAL|LFP cell achieves an energy density of 180 Wh kg−1 due to the ability to match a high-loading (8 mg cm−2) cathode. Furthermore, the double-layer Li|PAL|LFP pouch cell demonstrates excellent flexibility and safety in cycling and abuse tests.
中文翻译：
用于全固态锂金属电池的二氧化碳辅助诱导自组装芳纶纳米纤维气凝胶复合固体聚合物电解质
全固态锂金属电池（ASSLMB）对于开发下一代高安全性、高能量密度锂电池具有广阔的前景，但仍面临锂枝晶生长和厚度的挑战。在此，开发了由低密度自支撑芳纶纳米纤维（ANF）气凝胶框架支撑的超薄PEO基复合固体聚合物电解质（表示为PAL）。通过新颖的CO 2辅助诱导自组装方法获得的ANF气凝胶具有精心设计的双交联度双层结构。受益于 ANF 和 PEO 之间的分子间相互作用，PAL 实现了超薄厚度 (20 µm)，并具有出色的热稳定性和机械强度。同时，由于功能化ANF对离子路径的调节，PAL实现了均匀的锂沉积而没有枝晶，从而使对称电池实现稳定的长循环（1400小时）。因此，Li|PAL|LiFePO 4 (LFP)电池具有优异的长期循环稳定性（1 C，>700次循环，库仑效率> 99.8%）和快速充/放电性能（倍率，10 C）。更实际地，Li|PAL|LFP电池由于能够匹配高负载（8 mg cm -2 ）阴极，因此实现了180 Wh kg -1的能量密度。此外，双层Li|PAL|LFP软包电池在循环和滥用测试中表现出优异的灵活性和安全性。
更新日期：2024-01-08
中文翻译：
用于全固态锂金属电池的二氧化碳辅助诱导自组装芳纶纳米纤维气凝胶复合固体聚合物电解质
全固态锂金属电池（ASSLMB）对于开发下一代高安全性、高能量密度锂电池具有广阔的前景，但仍面临锂枝晶生长和厚度的挑战。在此，开发了由低密度自支撑芳纶纳米纤维（ANF）气凝胶框架支撑的超薄PEO基复合固体聚合物电解质（表示为PAL）。通过新颖的CO 2辅助诱导自组装方法获得的ANF气凝胶具有精心设计的双交联度双层结构。受益于 ANF 和 PEO 之间的分子间相互作用，PAL 实现了超薄厚度 (20 µm)，并具有出色的热稳定性和机械强度。同时，由于功能化ANF对离子路径的调节，PAL实现了均匀的锂沉积而没有枝晶，从而使对称电池实现稳定的长循环（1400小时）。因此，Li|PAL|LiFePO 4 (LFP)电池具有优异的长期循环稳定性（1 C，>700次循环，库仑效率> 99.8%）和快速充/放电性能（倍率，10 C）。更实际地，Li|PAL|LFP电池由于能够匹配高负载（8 mg cm -2 ）阴极，因此实现了180 Wh kg -1的能量密度。此外，双层Li|PAL|LFP软包电池在循环和滥用测试中表现出优异的灵活性和安全性。
京公网安备 11010802027423号