The Origin of Li2S2 Reduction Mechanism Modulated by …
2025年2月10日 · The results show that the $ {d_ { {z^2}}}$ orbital of Ni exhibits a significant vertical hybridization phenomenon from the inert dsp 2 hybridization state to the active d 2 sp …
Manipulating Li2S2/Li2S mixed discharge products of all-solid …
2023年10月12日 · Using X-ray absorption spectroscopy and time-of-flight secondary ion mass spectrometry, we reveal that the discharge product of all-solid-state lithium-sulfur batteries is not solely composed of...
硫化锂_百度百科
硫化锂，分子式：Li2S，为锂的硫化物，分子量：45.95。 白色至黄色晶体。 具有反萤石结构。 比重1.66（水=1），熔点938℃，沸点1372℃。 易溶于水，可溶于乙醇，溶于酸，不溶于碱。 可作为可充电锂离子电池中的潜在电解质材料。 白色至黄色 晶体。 具有 反萤石结构。 比重1.66（水=1）， 熔点 938℃，沸点1372℃。 易溶于水，可溶于 乙醇，溶于酸，不溶于碱 [1]。 在空气中易吸收水蒸气发生水解，放出剧毒硫化氢气体。 可被酸分解放出硫化氢；可与硝酸剧烈反应， …
Current-density dependence of Li 2 S/Li 2 S 2 growth in …
2019年6月12日 · Lithium–sulfur (Li–S) batteries with a high theoretical energy density based on multi-electron redox reactions were strongly considered. The lithium disulfide/sulfide (Li2S2/Li2S, denoted as Li2S1/2) precipitation is critical to achieve high sulfur utilization.
Expediting the Conversion of Li - ACS Publications
2021年3月30日 · The solid–solid conversion of Li2S2 to Li2S is a crucial and rate-controlling step that provides one-half of the theoretical capacity of lithium–sulfur (Li–S) batteries.
Prediction of New Phase and Electrochemical Properties of Li
2018年5月14日 · In this work, by using ab initio calculations, we present results of novel phases, average open circuit voltages (Voc s), and electronic properties of the stable Li 2 S 2. Two new Li 2 S 2 phases are predicted: orthorhombic (Cmca) and orthorhombic (Immm) structures.
Stable performance of Li-S battery: Engineering of Li2S smart …
2021年5月5日 · In-situ generated new class of Li2S cathode for Li-S battery application. Lithium-sulfur (Li–S) batteries are considered promising candidates for next-generation energy storage devices due to their ultrahigh theoretical gravimetric energy density, cost-effectiveness, and environmental friendliness.
Direct Monitoring of Li2S2 Evolution and Its Influence on the ...
2023年1月17日 · A series of operando spectral results reveal that Li 2 S 2 undergoes chemical reactions accompanied by its electrochemical conversions during operation for the first time. …
Promoting the Transformation of Li2S2 to Li2S: Significantly …
2019年5月7日 · Ether-based Li–S batteries involve sophisticated multistep solid–liquid–solid–solid electrochemical reaction mechanisms. Recently, studies on Li–S batteries have widely focused on the initial solid (sulfur)–liquid (soluble polysulfide)–solid (Li 2 S 2) conversion reactions, which contribute to the first 50% of the theoretical ...
崔屹/鲍哲南，最新PNAS：锂硫电池再现“中庸之道” - 知乎
在Li-S电池中，固态S在锂化后转化为一组中间体LiPS (Li2Sx，2<x<8)。 电池性能与LiPSs在电解质中的溶解度密切相关。 对于具有超高/高溶解度的LiPSs电解质，如DMI和DOL/DME，因穿梭效应而限制了电池的性能 (快速容量衰减和低CE)。 相反，由于固-固S-Li2S电化学过程中存在较大的电子/离子转移阻抗，导致Li-S反应缓慢 (容量利用率低、循环寿命短)，也限制了低/超低LiPS溶解度电解质的电池性能。 因此，设计具有中等溶解度的电解质对于限制穿梭效应但仍能实现快速 …