Hybrid solid electrolyte enabled dendrite-free Li anodes for high-performance quasi-solid-state lith

来源 :国家科学评论(英文版) | 被引量 : 0次 | 上传用户:qiuenqiuen
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
The dendrite growth of Li anodes severely degrades the performance of lithium-oxygen(Li-O2)batteries.Recently,hybrid solid electrolyte(HSE)has been regarded as one of the most promising routes to tackle this problem.However,before this is realized,the HSE needs to simultaneously satisfy contradictory requirements of high modulus and even,flexible contact with Li anode,while ensuring uniform Li+distribution.To tackle this complex dilemma,here,an HSE with rigid Li1.5Al0.5Ge1.5(PO4)3(LAGP)core@ultrathin flexible poly(vinylidene fluoride-hexafluoropropylene)(PVDF-HFP)shell interface has been developed.The introduced large amount of nanometer-sized LAGP cores can not only act as structural enhancer to achieve high Young's modulus but can also construct Li+diffusion network to homogenize Li+distribution.The ultrathin flexible PVDF-HFP shell provides soft and stable contact between the rigid core and Li metal without affecting the Li+distribution,meanwhile suppressing the reduction of LAGP induced by direct contact with Li metal.Thanks to these advantages,this ingenious HSE with ultra-high Young's modulus of 25 GPa endows dendrite-free Li deposition even at a deposition capacity of 23.6 mAh.Moreover,with the successful inhibition of Li dendrites,the HSE-based quasi-solid-state Li-O2 battery delivers a long cycling stability of 146 cycles,which is more than three times that of gel polymer electrolyte-based Li-O2 battery.This new insight may serve as a starting point for further designing of HSE in Li-O2 batteries,and can also be extended to various battery systems such as sodium-oxygen batteries.
其他文献
Knowledge of intrinsic wettability at solid/liquid interfaces at the molecular level perspective is significant in understanding crucial progress in some fields
春秋时,圣人孔子有一个结论性的名言传诵至今,曰:“欲速则不达。”虽然不是绝对,但因急于求成而达不到目的的事肯定不少。人们发现:欲速则达的事也很多,世间成就,很多是急出
The coronavirus disease 2019(COVID-19)has evolved to a global pandemic since its inception in December 2019.Countries have responded to the epi-demics with diff
期刊
Two-dimensional(2D)materials have attracted increasing interest since the first isolation of graphene from graphite in 2004[1]and subsequent exfoliation of othe
期刊
【目的】低CO_2大气浓度对陆生植物的影响研究对预测CDAC升高的潜在影响、评估群落组成的动态变化和生态系统功能、从进化时间尺度上探讨全球气候变化下陆地生态系统的碳循环