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Anode-free, Lean-Electrolyte Lithium-Sulfur Batteries Enabled by Tellurium-Stabilized Lithium Deposition. Joule 4, 1121-1135(2020 ).https://doi.org/10.1016/j.joule.2020.03.020.
該文章報(bào)道了為了實(shí)現(xiàn)實(shí)際可行的鋰硫(Li-S)電池,通過(guò)在Li-S體系中引入碲(Te)作為陰極添加劑,在Li表面形成碲化且富含硫化物的固體電解質(zhì)界面(SEI)層,從而顯著提高Li鍍層和剝離的可逆性,同時(shí)減少過(guò)量鋰和電解液。,這些聚硫醚遷移到陽(yáng)極側(cè),并原位形成穩(wěn)定的硫代碲酸鋰和碲化鋰作為SEI組分。XPS的結(jié)果表明Te與多硫化物反應(yīng)生成可溶性聚硫醚,而可溶性聚硫醚與Li金屬反應(yīng)則被部分還原,并通過(guò)量化方法以及XRD證明有Li2TeS3的存在,從而推斷出Li2S陰極產(chǎn)生的多硫化物將與Te0添加劑反應(yīng),形成聚硫醚,遷移到陽(yáng)極側(cè),并在沉積的Li上形成Li2TeS3。在無(wú)陽(yáng)極全電池的有限鋰條件下,含有還原S SEI成分的Te的形成可以穩(wěn)定鋰沉積并改善性能。
Zheng, Q., Yamada, Y., Shang, R. et al. A cyclic phosphate-based battery electrolyte for high voltage and safe operation. Nat Energy 5, 291–298 (2020). https://doi.org/10.1038/s41560-020-0567-z
該文獻(xiàn)主要報(bào)告了設(shè)計(jì)并合成了一種五元氟化環(huán)磷酸鹽(TFEP)溶劑,旨在鈍化石墨陽(yáng)極,實(shí)現(xiàn)可逆的鋰化和去鋰化,同時(shí)保持磷固有的滅火性能,有望提供優(yōu)異的不燃性和優(yōu)異的石墨陽(yáng)極循環(huán)性。利用XPS研究了在該種電解質(zhì)三次循環(huán)前后石墨電極表面的化學(xué)成分,XPS結(jié)果表明TFEP溶劑的還原是SEI膜形成的主要途徑。
更多文獻(xiàn)鏈接
l Transition metal-doped Ni-rich layered cathode materials for durable Li-ion batteries. https://doi.org/10.1038/s41467-021-26815-6
l XUltra-high-voltage Ni-rich layered cathodes in practical Li metal batteries enabled by a sulfonamide-based electrolyte. https://doi.org/10.1038/s41560-021-00792-y
l Localized Electron Density Redistribution in Fluorophosphate Cathode: Dangling Anion Regulation and Enhanced Na-Ion Diffusivity for Sodium-Ion Batteries. https://doi.org/10.1002/adfm.202109694
l XPS on Li-Battery-Related Compounds: Analysis of Inorganic SEI Phases and a Methodology for Charge Correction. https://doi.org/10.1021/acsaem.8b00406
l A synergistic exploitation to produce high-voltage quasi-solid-state lithium metal batteries. https://doi.org/10.1038/s41467-021-26073-6