本文選題：LiPS　切入點(diǎn)：硫化物固體電解質(zhì)　出處：《中南大學(xué)學(xué)報(bào)(自然科學(xué)版)》2016年02期 　論文類型：期刊論文

【摘要】：采用墨水涂覆技術(shù)制備基于硫化物的電解質(zhì)薄膜及其全固態(tài)鋰離子電池。通過(guò)N-甲基吡咯烷酮(NMP)溶劑對(duì)真空燒結(jié)法制得的Li_8P_2S_9粉末進(jìn)行處理,獲得均勻、穩(wěn)定的湛藍(lán)色Li_8P_2S_9墨水。研究結(jié)果表明:NMP溶劑處理后的Li_8P_2S_9顆粒粒徑從10μm降低到1μm左右,物相晶體結(jié)構(gòu)不變,但改善顆粒間的接觸性能。在Li_8P_2S_9墨水中添加一定量的聚偏二氟乙烯(PVDF)黏結(jié)劑,溶解完全后將墨水滴涂在磷酸鐵鋰正極表面,除去溶劑即可一步實(shí)現(xiàn)電解質(zhì)的成膜及電解質(zhì)與正極的復(fù)合。當(dāng)PVDF與Li_8P_2S_9的質(zhì)量比為1:10時(shí),電解質(zhì)膜30℃下的鋰離子電導(dǎo)率為2.03×10~(-4)S/cm,25℃電化學(xué)窗口為5.15V。以該墨水涂覆法制得的LiFePO_4/Li電池可在室溫下穩(wěn)定工作,0.2C下循環(huán)100圈的平均比容量為113.7mA·h/g,庫(kù)侖效率為99%。
[Abstract]:The sulfide-based electrolyte film and its all-solid lithium ion battery were prepared by ink coating technique. The Li_8P_2S_9 powder prepared by vacuum sintering was treated with N-methylpyrrolidone (NMP) solvent, and the results were uniform. Stable blue Li_8P_2S_9 ink. The results show that the particle size of Li_8P_2S_9 is reduced from 10 渭 m to about 1 渭 m, and the crystal structure of the phase is unchanged. However, the contact properties between particles were improved. Adding a certain amount of PVDF binder to Li_8P_2S_9 ink, the ink droplets were coated on the surface of lithium iron phosphate positive electrode after dissolved completely. When the mass ratio of PVDF to Li_8P_2S_9 is 1:10, the film formation of electrolyte and the recombination of electrolyte and positive electrode can be realized in one step by removing the solvent. The lithium ion conductivity of the electrolyte membrane at 30 鈩，

本文編號(hào)：1561375