組合化學設計及相變機理
李志光, 黃可龍
(中南大學 化學化工學院,長沙 410083)
摘 要: 將組合化學應用于功能電極材料開發(fā)，設計出鋰離子電池正極材料三角形分子庫。采用空間標碼、高溫固相平行合成法，以鋰、鈷、錳、鎳4種元素的化合物為原料，合成了鋰離子二次電池的正極材料。以所測材料的充放電性能為篩選指標，成功地確定了電化學性能優(yōu)良、組成構型一定的正極材料。實驗中發(fā)現(xiàn)正極材料中因鈷、鎳、錳的配比不同而產生的相變現(xiàn)象，最后還討論了材料的相變機理。
關鍵字: 分子庫；鋰離子二次電池；平行合成
mechanism of their phase transitions
LI Zhi-guang, HUANG Ke-long
（School of Chemistry and Chemical Engineering,
Central South University, Changsha 410083, China）
Abstract:The triangle molecular library of the cathode materials of Li-ion batteries was designed. The Li-ion battery cathode materials were prepared by the use of the parallel high-temperature-solid-state synthesis and spatially addressable library of the cathode materials. The raw materials of combinatorial library were synthesized by the compounds including lithium, cobalt, manganese and nickel. Excellent and stable cathode materials were identified by current-voltage method and the phase transition mechanism of some cathode materials of the triangle molecular library was studied.
Key words: molecular library; lithium-ion secondary battery; parallel synthesis method
