2022-07-18
锂离(li)子电池正极材料常见(jian)的(de)有锂镍氧(yang)(yang)化(hua)(hua)(hua)(hua)物(wu),锂钴(gu)氧(yang)(yang)化(hua)(hua)(hua)(hua)物(wu),锂钛氧(yang)(yang)化(hua)(hua)(hua)(hua)物(wu),镍钴(gu)多(duo)元氧(yang)(yang)化(hua)(hua)(hua)(hua)物(wu),锂铁磷氧(yang)(yang)化(hua)(hua)(hua)(hua)物(wu),锂锰氧(yang)(yang)化(hua)(hua)(hua)(hua)物(wu)等,接下来小编将为大家详细介绍一(yi)下:
1、锂钛氧化物:典型代表是钛酸锂,其优点(dian)是充电(dian)快(kuai)、安(an)全性高、循环寿命高达2万次以上,但(dan)其能量密度(du)小、价格昂贵。
2、锂镍氧化物:主要(yao)代表(biao)为镍酸(suan)锂,其能量密度大,高达274 mah/g,是理(li)想的锂离子电(dian)池正(zheng)极(ji)材料,但其安全性能较(jiao)差(cha),循环周期低,厂家使(shi)用其作(zuo)为正(zheng)极(ji)材料较(jiao)少。
3、锂锰(meng)(meng)氧(yang)化(hua)物:主要代表为锰(meng)(meng)酸(suan)锂、高(gao)锰(meng)(meng)酸(suan)锂,在我国资源相对(dui)丰富,是(shi)目前(qian)的研(yan)究热点,其中LiMn2O4高(gao)能(neng)量密度高(gao),但稳定(ding)性(xing)低,在高(gao)温条件(jian)下,LiMn2O4并不稳定(ding),但其主要优(you)势(shi)明显,产品无(wu)污染,安全(quan)性(xing)能(neng)好。
4、锂钴氧(yang)化物(wu):主要代(dai)表为钴酸锂。价(jia)格(ge)高(gao),产品(pin)单体的能(neng)量密度可达(da)274mAh/g,但系统的能(neng)量密度只能(neng)达(da)到138mAh/g,具有高(gao)能(neng)量密度、高(gao)价(jia)格(ge)、高(gao)功率、高(gao)商业(ye)化和(he)高(gao)循环寿(shou)命(ming)等特点,但其价(jia)格(ge)高(gao),钴盐必须进(jin)口。
5、镍(nie)(nie)钴多元(yuan)氧化物:常(chang)见的是镍(nie)(nie)钴锰酸锂(li)和(he)镍(nie)(nie)钴铝酸锂(li),其中镍(nie)(nie)钴铝酸锂(li)相对用(yong)得少。
6、锂铁磷(lin)氧化物:主要代表是(shi)磷(lin)酸铁锂,比亚(ya)迪是(shi)使用(yong)多。产品性(xing)能(neng)(neng)平衡,能(neng)(neng)量密度135mAh/g,无毒(du)无污染(ran),循环次数(shu)不低(di)于2000次。在(zai)零下20度和(he)50度的高(gao)温下,适当的温度对锂离子电池正(zheng)极材料(liao)的影响(xiang)也很小。作(zuo)为乘用(yong)车(che)的动力源,其安全性(xing)高(gao)。
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锂(li)电(dian)池(chi)(chi)自发(fa)(fa)明(ming)以(yi)来已广泛应用(yong)于3C电(dian)子产品。随(sui)着智(zhi)能穿戴电(dian)子设备的(de)发(fa)(fa)展,对超(chao)薄(bo)(bo)(bo)锂(li)电(dian)池(chi)(chi)的(de)需求越来越大(da)。目(mu)前,超(chao)薄(bo)(bo)(bo)电(dian)池(chi)(chi)可(ke)以(yi)比纸做得更薄(bo)(bo)(bo),并且可(ke)以(yi)弯曲和(he)折(zhe)叠,这(zhei)是真的(de)吗?让我们来看看超(chao)薄(bo)(bo)(bo)电(dian)池(chi)(chi)的(de)发(fa)(fa)展现状。1、在超(chao)薄(bo)(bo)(bo)锂(li)电(dian)池(chi)(chi)方面由于锂(li)电(dian)池(chi)(chi)本身制(zhi)造的(de)原材料特性的(de)限制(zhi)
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