發(fā)布時(shí)間：2018-05-13 22:30

  本文選題：富鋰層狀氧化物 + 陽離子排布　； 參考：《化學(xué)進(jìn)展》2017年04期

【摘要】：鋰離子電池作為新型的儲(chǔ)能形式,緩解了人們對(duì)化石燃料的依賴和日益嚴(yán)峻的環(huán)境壓力。富鋰層狀氧化物相比于傳統(tǒng)正極材料,由于其低成本和大可逆容量的特性,被譽(yù)為最具發(fā)展?jié)摿Φ南乱淮囯x子電池正極材料之一,尤其是在電動(dòng)汽車和大規(guī)模儲(chǔ)能電網(wǎng)領(lǐng)域的應(yīng)用前景十分廣闊。本文從材料的結(jié)構(gòu)類型出發(fā),主要介紹了固溶體結(jié)構(gòu)和復(fù)合結(jié)構(gòu)在晶格排布上的差異以及在鑒別這種差異時(shí)所采用的一系列表征手段。本文還總結(jié)了近年來提出的最具代表性的幾種4.5V電壓平臺(tái)產(chǎn)生機(jī)理,從不同角度解釋了富鋰層狀氧化物在首次循環(huán)過程中表現(xiàn)出異常容量的現(xiàn)象,并結(jié)合現(xiàn)有研究闡述了各種機(jī)理。此外,也對(duì)阻礙富鋰層狀氧化物進(jìn)一步發(fā)展的重大問題,包括首次不可逆容量損失、循環(huán)性能和倍率性能等進(jìn)行了分析,討論了表面尖晶石相對(duì)材料性能的影響,介紹了幾種最典型的改性手段。最后,對(duì)富鋰層狀氧化物正極材料未來的研究方向進(jìn)行了概述,展望其研究前景。
[Abstract]:As a new type of energy storage, lithium ion batteries relieve people's dependence on fossil fuels and increasingly severe environmental pressure. Compared with traditional cathode materials, layered oxides rich in lithium are regarded as one of the most promising cathode materials for lithium-ion batteries because of their low cost and large reversible capacity. Especially in the field of electric vehicles and large-scale energy storage grid applications are very broad. Based on the structural types of the materials, the differences between the structure of solid solution and the composite structure in lattice arrangement and a series of characterization methods used to identify the differences are introduced in this paper. This paper also summarizes the generation mechanism of the most representative 4.5V voltage platform proposed in recent years, and explains from different angles the abnormal capacity of the lithium rich layered oxide during the first cycle. Combined with existing studies, various mechanisms are expounded. In addition, some important problems that hinder the further development of Li-rich layered oxides, including the first irreversible loss of capacity, cyclic performance and ratio performance, are also analyzed. The effect of surface spinel on material properties is also discussed. Several typical modification methods are introduced. Finally, the future research direction of lithium-rich layered oxide cathode materials is summarized, and its research prospect is prospected.
【作者單位】： 東北大學(xué)冶金學(xué)院;東北大學(xué)遼寧省冶金傳感器及技術(shù)重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(No.51274057,51474057)資助~~
【分類號(hào)】：O646.54;TM912
，

本文編號(hào)：1885118