本文選題：鋰原電池 + 高溫儲(chǔ)存　； 參考：《天津大學(xué)》2014年碩士論文

【摘要】：以金屬鋰為負(fù)極的鋰原電池（不可再充電的鋰一次電池），如鋰-錳電池、鋰-二氧化硫電池、鋰-亞硫酰氯電池等，具有高比能、大容量、高可靠性等特點(diǎn)，可用于便攜式電器和電子裝置，已經(jīng)在國(guó)民經(jīng)濟(jì)的各個(gè)領(lǐng)域中得到了廣泛的應(yīng)用。由于在鋰原電池的實(shí)際使用過(guò)程中，不可避免地需要在使用前儲(chǔ)存一段時(shí)間，，而在這一儲(chǔ)存過(guò)程中，特別是在高溫儲(chǔ)存條件下，電池的性能如放電容量、電池阻抗、安全性能等會(huì)出現(xiàn)一定程度的下降，而這些下降會(huì)不同程度地影響到鋰原電池的使用效果。為了深入研究鋰原電池的貯存性能，本文針對(duì)兩種新型鋰原電池，即鋰-亞硫酰氯（Li/SOCl2）電池和鋰-氟化碳（Li/CFx）電池，分別研究了不同儲(chǔ)存時(shí)間和不同儲(chǔ)存溫度對(duì)電池放電性能的影響規(guī)律。 首先，本文以氟化碳為正極，金屬鋰為負(fù)極制備了Li/CFx電池（865mAh·g-1），然后分別考察了電池在40℃、55℃、70℃的溫度下儲(chǔ)存一定時(shí)間后的放電性能，并且通過(guò)SEM、XRD等測(cè)試手段表征了電池正極儲(chǔ)存前后表面形貌和活性物質(zhì)相結(jié)構(gòu)的變化。實(shí)驗(yàn)發(fā)現(xiàn)，儲(chǔ)存溫度越高，儲(chǔ)存時(shí)間越長(zhǎng)，Li/CFx電池容量的衰減越嚴(yán)重，放電的電壓平臺(tái)越低，電壓滯后現(xiàn)象也越明顯。SEM的測(cè)試結(jié)果表明，高溫儲(chǔ)存后，CFx正極表面產(chǎn)生了許多大小均勻的LiF顆粒。從XRD的分析可知，電池在高溫儲(chǔ)存過(guò)程中會(huì)發(fā)生自放電反應(yīng)，產(chǎn)生了高阻抗的LiF。 由于金屬鋰非�；顫�，Li/SOCl2電池在高溫下儲(chǔ)存時(shí)，電池容量會(huì)發(fā)生不同程度的衰減，而且儲(chǔ)存時(shí)間不同，電池容量衰減的程度也不一樣。本文研究了不同儲(chǔ)存溫度和不同儲(chǔ)存時(shí)間對(duì)Li/SOCl2電池放電性能的影響。實(shí)驗(yàn)結(jié)果表明，儲(chǔ)存溫度越高，儲(chǔ)存時(shí)間越長(zhǎng)，電池放出的容量越少，放電電壓平臺(tái)也越低，儲(chǔ)存后電池的阻抗也變得越大。此外，Li/SOCl2電池在高溫下儲(chǔ)存一段時(shí)間后，開(kāi)路電壓也會(huì)升高。 文章最后通過(guò)加速壽命試驗(yàn)的方法對(duì)Li/SOCl2電池在常溫下的儲(chǔ)存壽命進(jìn)行了預(yù)測(cè)，由0.01C的放電數(shù)據(jù)得到的儲(chǔ)存壽命模型為：t=0.00135+4900.45*0.9094T，由此可預(yù)測(cè)出電池常溫下的儲(chǔ)存壽命為456.19天；由0.03C放電數(shù)據(jù)得到的儲(chǔ)存壽命模型為：t=-0.8582+3362.6*0.91734T，并預(yù)測(cè)電池在常溫下的儲(chǔ)存壽命為388.09天。
[Abstract]:Lithium primary battery with metal lithium as negative electrode (non-rechargeable lithium primary battery, such as lithium manganese battery, lithium sulfur dioxide battery, lithium thioacyl chloride battery, etc.) has the characteristics of high specific energy, large capacity, high reliability, etc. Can be used in portable electrical and electronic devices, has been widely used in various fields of the national economy. In the actual use of the lithium battery, it is inevitable to store it for a period of time before it is used, but in this storage process, especially under the condition of high temperature storage, the battery performance such as discharge capacity, battery impedance, The safety performance will decrease to a certain extent, and these decreases will affect the effect of lithium primary battery to some extent. In order to study the storage performance of lithium battery, two new types of lithium primary battery, namely Lithioyl chloride Lip / SOCl2) battery and Li-fluorocarbon lithium / CFX battery, were studied in this paper. The effects of different storage time and storage temperature on the discharge performance of the battery were studied. Firstly, Li/CFx battery was prepared by using carbon fluoride as positive electrode and lithium metal as negative electrode. The discharge performance of Li/CFx battery was investigated after storage at 40 鈩

本文編號(hào)：1884871