2022-06-11
锂(li)电池(chi)与镍氢电池(chi)相比哪个更好,首(shou)先要看(kan)两(liang)者(zhe)用于哪类产品(pin),其次要比较(jiao)两(liang)者(zhe)的经(jing)济效益,这样才能更好的知道锂(li)电池(chi)和镍氢金(jin)属电池(chi)哪个好。
一(yi)、镍氢电池的优缺点
1、镍氢电池的(de)优点(dian):
(1)能量密度高,是镍镉的1.5倍;
(2)电(dian)(dian)压1.2V-1.3V,相(xiang)当于镍镉电(dian)(dian)池;
(3)无(wu)记忆效应,循环(huan)寿(shou)命(ming)长;
(4)可放电大电流(liu),承受过(guo)充、过(guo)放电能力;
(5)无污(wu)染(ran),属于绿(lv)色电池。
2、镍(nie)氢电池的缺点:
(1)价格高于(yu)镍镉电池,正极材(cai)料为稀(xi)土合金(jin);
(2)自放(fang)电速度大。
二、锂电池的优缺点
1、锂电池的优点:
(1)电(dian)(dian)压高(gao):单个电(dian)(dian)池的工作电(dian)(dian)压高(gao)达3.7-3.8V,是镍(nie)镉(ge)电(dian)(dian)池、镍(nie)氢电(dian)(dian)池的3倍;
(2)比(bi)能大:目(mu)前可实现的实际比(bi)能约为(wei)555Wh/kg,即(ji)材料的比(bi)容量可达150mAh/g以上,接近其理论(lun)值的88%左(zuo)右;
(3)循环寿命长:一般可达(da)500次(ci)以上,甚至1000次(ci)以上,磷酸铁锂可达(da)2000次(ci)以上。对于小电流放(fang)电电器,电池(chi)寿命将成倍增(zeng)加;
(4)安(an)全(quan)性(xing)能好:无污染、无记忆效果;
(5)自放(fang)电(dian)小:室温下(xia)完全充电(dian)的锂离(li)子储存1个月(yue)后自放(fang)电(dian)率约为(wei)2%,远(yuan)低于其它电(dian)池;
(6)快速充(chong)放电:充(chong)电30分钟后容量(liang)可(ke)达(da)到公(gong)称容量(liang)的80%以上,现在的磷铁电池(chi)充(chong)电10分钟后可(ke)达(da)到公(gong)称容量(liang)的90%;
(7)工作温(wen)度范围宽(kuan):工作温(wen)度为-25~55°C,随着电(dian)解(jie)液和(he)正极的改进,有(you)望(wang)拓宽(kuan)至-40~70°C。
2、锂电池的缺点:
(1)老化:与其(qi)他可(ke)充电电池(chi)不同,锂离子电池(chi)的容(rong)量会慢(man)慢(man)退化,不是随着(zhe)使用次数而退化,而是随着(zhe)温度而退化;
(2)不(bu)能过(guo)充:过(guo)充过(guo)程中,过(guo)多嵌入的锂离子将永久固(gu)定在(zai)晶(jing)格中,不(bu)能再(zai)次释放,导(dao)致电池寿命短,产生(sheng)气体(ti),导(dao)致气鼓;
(3)不能(neng)过放电:过放电时,由于锂(li)离(li)子过多导(dao)致电极脱嵌,导(dao)致晶格(ge)坍塌,缩短寿命,造成气(qi)鼓;
(4)需要多(duo)(duo)种保(bao)护(hu)机制(zhi):锂离子电池设计有(you)多(duo)(duo)种保(bao)护(hu)机制(zhi),使用不当(dang)会降低电池寿命,甚至导(dao)致爆炸。
上一页:浅谈聚合物锂电池电芯结构图
下一页: 聚合物锂电池电芯操作注意事项
从近十(shi)年(nian)(nian)我国共(gong)享充电宝相关企业(ye)的年(nian)(nian)注(zhu)册量变化来看,企查查数(shu)据显示,2017年(nian)(nian)注(zhu)册量为15家,同(tong)比(bi)(bi)增(zeng)长114.3%。2019年(nian)(nian)行(xing)业(ye)进入高(gao)速发展(zhan)期,注(zhu)册量涨至68家,同(tong)比(bi)(bi)增(zeng)长172.0%。2020年(nian)(nian)注(zhu)册量达到十(shi)年(nian)(nian)来高(gao)的84家,同(tong)比(bi)(bi)增(zeng)长23.5%。 据新
聚合物锂离(li)(li)子(zi)(zi)电(dian)(dian)(dian)(dian)池可分为(wei)三类,具(ju)体如(ru)下(xia)(xia):1、固(gu)体聚合物电(dian)(dian)(dian)(dian)解质锂离(li)(li)子(zi)(zi)电(dian)(dian)(dian)(dian)池。电(dian)(dian)(dian)(dian)解质是聚合物和盐的混(hun)合物。该电(dian)(dian)(dian)(dian)池室温下(xia)(xia)离(li)(li)子(zi)(zi)电(dian)(dian)(dian)(dian)导(dao)率(lv)低,可应用于(yu)高温环境下(xia)(xia)。2、凝胶(jiao)聚合物电(dian)(dian)(dian)(dian)解质锂离(li)(li)子(zi)(zi)电(dian)(dian)(dian)(dian)池。即在固(gu)体聚合物电(dian)(dian)(dian)(dian)解质中(zhong)加入增塑(su)剂等(deng)添加剂,以提(ti)高离(li)(li)子(zi)(zi)电(dian)(dian)(dian)(dian)导(dao)率(lv),一(yi)般应用于(yu)常(chang)温
电(dian)(dian)容式锂(li)离子(zi)电(dian)(dian)池(chi)(chi)是将锂(li)电(dian)(dian)池(chi)(chi)、超级电(dian)(dian)容和(he)石(shi)墨(mo)烯结合而发明的(de)一种(zhong)新(xin)型电(dian)(dian)池(chi)(chi),具有(you)很大的(de)市场潜力(li)锂(li)电(dian)(dian)池(chi)(chi)和(he)超级电(dian)(dian)容是目前应(ying)用(yong)(yong)广泛的(de)两种(zhong)储(chu)能器件。它(ta)们的(de)原理、特点和(he)应(ying)用(yong)(yong)范(fan)围各(ge)不相同,各(ge)有(you)优(you)点。石(shi)墨(mo)烯自问世以来(lai),由于其极强(qiang)的(de)导电(dian)(dian)性,一直被认为是一种(zhong)革命性的(de)储(chu)能材
一般来说,电池的(de)(de)工(gong)作(zuo)温(wen)度(du)在(zai)40 ℃ 左右是正常(chang)的(de)(de),但在(zai)一些实际使用环境中,特别是在(zai)高(gao)温(wen)地区,电池的(de)(de)工(gong)作(zuo)温(wen)度(du)可能会达到(dao)75 ℃ 或以上,这基本上需要(yao)耐高(gao)温(wen)的(de)(de)电池。目(mu)前耐高(gao)温(wen)电池主(zhu)要(yao)有聚合物三元锂电池、聚合物锂电池和磷酸铁锂电池,那么哪种(zhong)电池好(hao)呢?1、耐
磷酸(suan)铁(tie)锂(li)铝壳电(dian)(dian)(dian)(dian)(dian)池(chi)的(de)优(you)势(shi)有哪些?1、重量(liang)轻(qing):同一规格(ge)容(rong)量(liang)的(de)磷酸(suan)铁(tie)锂(li)铝壳电(dian)(dian)(dian)(dian)(dian)池(chi)的(de)体积(ji)是(shi)铅酸(suan)电(dian)(dian)(dian)(dian)(dian)池(chi)的(de)2/3,重量(liang)是(shi)铅酸(suan)电(dian)(dian)(dian)(dian)(dian)池(chi)的(de)1/3。2、高温性能好:磷酸(suan)铁(tie)锂(li)铝壳电(dian)(dian)(dian)(dian)(dian)池(chi)电(dian)(dian)(dian)(dian)(dian)峰值(zhi)高达350℃-500℃,工(gong)(gong)作温度(du)范围广。3、大容(rong)量(liang):充电(dian)(dian)(dian)(dian)(dian)电(dian)(dian)(dian)(dian)(dian)池(chi)在充满不放完电(dian)(dian)(dian)(dian)(dian)的(de)条(tiao)件(jian)下(xia)工(gong)(gong)作时,
钴(gu)酸(suan)(suan)锂(li)(li)离(li)子(zi)电(dian)池(chi)组件的核心材料(liao)是钴(gu)和(he)锂(li)(li)。钴(gu)酸(suan)(suan)锂(li)(li)锂(li)(li)金属电(dian)池(chi)的循环性(xing)能与其材料(liao)钴(gu)和(he)锂(li)(li)有很(hen)大关系。下(xia)面从钴(gu)酸(suan)(suan)锂(li)(li)离(li)子(zi)电(dian)池(chi)的工作原理出发(fa),深(shen)入了解其电(dian)化学性(xing)能的优缺点(dian)。锂(li)(li)钻酸(suan)(suan)的化学式为LiCoO2,是一(yi)种无机化合物,一(yi)般用作锂(li)(li)离(li)子(zi)电(dian)池(chi)的正极(ji)材料(liao)。一(yi)、钴(gu)酸(suan)(suan)锂(li)(li)离(li)子(zi)电(dian)