锂离子电池低温性能影响因素的分析与研究
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作者签名:谰峨丽
日期:劭咿j月?J日
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论文被查阅和借阅。本人授权湖南大学可以将本学位论文的全部或部分 内容编入有关数据库进行检索,可以采用影印、缩印或扫描等复制手段 保存和汇编本学位论文。
range
many faults such as weak low-temperature performance,heavy load discharge
performance
many
and security
other fields.
issue except for it
advantages which
学校代号:10532
学 密 号:S10072027 级:不保密
湖南大学硕士学位论文
锂离子电池低温性能影响因素 的分析与研究
Analysis and study
on
the effects of the low temperature
-
for’ithium.ion performance eIor cnamllthlum rotreoyrettaB
energy
density,long life,reproducible and clean et a1.It has been
a
focus of research in energy,and will gradually replace the traditional nickel・metal hydride, nickel
69.36%。然后再注入动力型电解液。实验结果显示在O℃至.10℃的低温环境下,
注入动力型电解液两种电池的低温性能相差不大,在一10℃下,低温放电容量占常 温放电容量的比例分别为86.89%和86.86%,但在一5℃低温下,注入动力型电解液 两种电池的低温性能要优于注入普通电解液电池的低温性能。 (2)其次分析了锰酸锂正极材料、三元材料及磷酸铁锂正极材料对电池低温
本学位论文属于 1、保密口,在 2、不保密囹。 年解密后适用本授权书。
(请在以上相应方框内打“、/”)
作者签名: 导师签名:
日期: 日期:
劫l;年.t-月刁日
劢J)年,月弓户
锂离子电池低温性能影响因素的分析与研究
摘
要
锂离子电池作为新一代清洁且可再生的的能源系统,具有能量密度高、寿命
长、无污染等优点,成为能源中研究的焦点,将逐步取代传统的镍氢、镍镉、铅
cadmium and
lead・acid batteries.It has been
widely
applied to mobile phones,digital still have
cameras,laptop computers and many other fields.Of
course,lithium-ion batteries
性能的影响。实验结果显示,动力型锰酸锂正极材料的低温性能比普通型材料的
低温性能要好,0℃下低温放电容量占常温放电容量的比例分别为94.28%和 78.64%,三元材料和普通锰酸锂材料的低温性能相接近,低温放电容量占常温放 电容量的比例为78.79%,铁锂材料电池的低温性能不及上述两种材料的低温性 能,低温放电容量占常温放电容量的比例为71.82%。 (3)再次分析了粘结剂及压实密度对磷酸铁锂电池低温性能的影响,实验结果 显示三种不同的粘结剂低温放电容量占常温放电容量的比例分别为71.82%、
capacity/normal
electrolyte
95.39%and 69.36%.Then inject
dynamical
two
kinds of
batteries,the result show that at O*Cto-I O*C low temperature kinds of conductive agent
surroundings,no
matter which
have
a
used,injecting dynamical
the
electrolyte batteries
rate
good
low-temperature
discharge
performance,at
difference
surroundings
of 0℃,the
Graduate School
of
Hunan University
Supervisor Professor XU Zhi
May,2013
湖南大学 学位论文原创性声明
本人郑重声明:所呈交的论文是本人在导师的指导下独立进行研究
所取得的研究成果。除了文中特别加以标注引用的内容外,本论文不包 含任何其他个人或集体已经发表或撰写的成果作品。对本文的研究做出 重要贡献的个人和集体,均已在文中以明确方式标明。本人完全意识到
applied to the batteries
made process,The research
content are
on
as follows:
(1)Firstly
to
I had
a
research
how the conductive agent,electrolyte to have
an
influence
low-temperature discharge
capacity/normal
a
temperature discharge capacity are
94.28%and
as
wk.baidu.com78.64%,three element material have
good
low—temperature performance
are
of low-temperature
capacity/normal
any
temperature discharge capacity
95.98%and 95.86%,which
mostly have CNT
between
this two kinds of batteries making with conductive agent
关键词:锂离子电池;导电剂;正极材料;压实密度;低温性能;
II
硕士学位论文
Abstract
As
a
new generation of clean and renewable energy system,lithium・ion batteries have many such
as
advantages
high
研究内容主要有以下几点:
(1)首先分析了导电剂及电解液对电池低温性能及其他电化学性能的影响,
实验采用碳纳米管和SP为导电剂,首先注入普通型电解液,研究导电剂对电池 低温性能的影响。实验结果显示采用碳纳米管导电剂电池的低温性能要比SP导 电剂电池的低温性能好,在0℃下低温放电容量占常温放电容量分别为95.39%和
lithium
iron phosphate batteries,the result show that using
three different kinds of caking agents batteries have different rate,the rate of low-temperature discharge capacity/normal temperature discharge capacity are 7 1.82%,77.88%and 78.85%. In this experiment we made three different batteries、析m three different compacted densities. which are 1.7 g/cm。,1.8 g/cm-3,1.9 g/cm"3,the result show that the batteries have best
酸等能源电池,已经被广泛的应用到手机、数码相机、笔记本电脑等各个领域。
虽然锂离子电池具有多方面的优点,但也存在一些缺点,如电池的低温性能、倍
率性能、安全问题等制约着锂离子电池在其他领域中广泛的应用。 本文主要针对电池的低温性能对电池制作过程中所使用的导电剂、电解液、
正极材料、粘结剂及工艺压实密度对电池低温性能的影响进行了分析研究,具体
attery
by
HuYueli
B.E.(Hunan UniVersity)2010
A thesis submitted in partial satisfaction of the
Requirements for the degree of
Master
of Science
Physics in the
a
The result display that
injected
CNT batteries has
good low-temperature
performance.At the
temperature
to
surroundings of 0*C,the rate of low-temperature discharge discharge capacity are
and
SP.But when temperature drop to-5"C,this two kinds of batteries
made诚m CNT
and SP,injected with
the batteries
dynamical
a
electrolyte have
a
better low-temperature
restrict in、析de
of applications in
This paper had
a
research
on
the factors of affecting the low-temperature
are
performances,
there are conductive agents,electrolyte,cathode material which
77.88%、78.85%。实验制作三种压实密度分别为1.79/cm一、1.89/cm一、1.99/cm.3
电池,实验结果显示,压实密度为1.89/cm。电池的低温性能最好。 (4)最后分析了恒流及阶梯式化成方式对电池低温性能的影响,实验结果显 示在一定范围内化成电流的大小对电池性能并无多大影响,而化成的方式对电池 的低温性能有一定的影响,恒流化成电池要优于阶梯式化成电池。
well
as
III
锂离子电池低温性能影响因素的分析与研究
common lithium manganite cathode material,at the
surroundings of 0℃,the
rate
of
low-temperature discharge capacity/normal temperature discharge capacity is 78.79%,lithium
iron phosphate material has
at
a
more inferior low-temperature performance than others material,
the O*C,the
rate
of low-temperature discharge
capacity/normal
performance than
of
injected
with common electrolyte.
(2)Secondly
I mainly had
research
on
lithium manganite,containing three element
a
cobalt,nickel,manganese,lithium iron phosphate material,the result demonstrated that dynamical lithium manganite cathode material have better low-temperature performance than the common lithium manganite cathode material,at the surroundings of 0℃,the rate of
and the
temperature discharge
capacity is 7 1.82%.
(3)Thirdly I analyzed the
low-temperature
effect that the caking agent
to
compacted density have
on
performance
low-temperature performance of
lithium—ion
batteries.Using CNT and SP as conductive
to two kinds of batteries.
agent
make
two
teams
of batteries.First
inject common electrolyte