Electrode thickness control: Precondition for quite different functions of graphene conductive additives in LiFePO4 electrode

石墨烯 电极 材料科学 导电体 锂(药物) 电导率 离子 纳米技术 光电子学 复合材料 化学 物理化学 医学 有机化学 内分泌学
作者
Lei Ke,Wei Lv,Fangyuan Su,Yan‐Bing He,Conghui You,Baohua Li,Zhengjie Li,Quan‐Hong Yang,Feiyu Kang
出处
期刊:Carbon [Elsevier BV]
卷期号:92: 311-317 被引量:47
标识
DOI:10.1016/j.carbon.2015.04.064
摘要

Because of high electrical conductivity, graphene has been widely investigated as conductive additive in lithium-ion batteries. Whereas, it is found that graphene has quite different influences on the rate performance in diverse evaluation systems, such as commercial soft-packed cells and coin half-cells. It has been proved that the coin cells show better high-rate performance with the increase of graphene content, while it is of the opposite trend in commercial cells. In normal cases, the electrode thickness of coin cells is much smaller than that of commercial cells. Herein, it is found that the electrode thickness has a considerable effect on the high-rate performance of LiFePO4 electrode in which graphene is used as the conductive additive. Thicker electrode results in a longer Li-ion diffusion path, and thus the steric effect that graphene could hinder the Li-ion diffusion is amplified, inducing much higher polarization and poorer performance at high rate. Comparatively, this phenomenon is not obvious in thinner electrode. Thus, when more graphene is introduced in thick electrode, the power performance is greatly weakened as is observed in the commercial cells. This finding is of great importance for designing a high-performance commercial lithium-ion battery with graphene additives.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
刚刚
muming完成签到,获得积分20
1秒前
sanlunainiu发布了新的文献求助10
1秒前
林博研完成签到,获得积分20
1秒前
FashionBoy应助风趣的灵枫采纳,获得10
2秒前
3秒前
yihuiqing发布了新的文献求助10
4秒前
likke发布了新的文献求助10
4秒前
嗝嗝发布了新的文献求助10
4秒前
小兔狸花昕完成签到,获得积分20
5秒前
IRer79完成签到,获得积分10
7秒前
彭于晏应助noah采纳,获得10
7秒前
青年才俊发布了新的文献求助10
7秒前
zhu发布了新的文献求助10
8秒前
波波蛋完成签到,获得积分10
8秒前
9秒前
10秒前
11秒前
maguodrgon发布了新的文献求助10
14秒前
科研通AI5应助shell采纳,获得80
14秒前
波波蛋发布了新的文献求助10
14秒前
15秒前
九鹤完成签到,获得积分10
15秒前
jsy完成签到,获得积分10
15秒前
量子星尘发布了新的文献求助10
16秒前
旷野发布了新的文献求助10
16秒前
16秒前
Owen应助浮云521采纳,获得10
16秒前
浮游应助muming采纳,获得10
16秒前
酷炫的凤妖完成签到 ,获得积分10
17秒前
18秒前
18秒前
20秒前
20秒前
20秒前
21秒前
22秒前
浮游应助勤劳的莆采纳,获得10
22秒前
23秒前
霜降发布了新的文献求助10
24秒前
高分求助中
(应助此贴封号)【重要!!请各用户(尤其是新用户)详细阅读】【科研通的精品贴汇总】 10000
Zeolites: From Fundamentals to Emerging Applications 1500
Architectural Corrosion and Critical Infrastructure 1000
Early Devonian echinoderms from Victoria (Rhombifera, Blastoidea and Ophiocistioidea) 1000
By R. Scott Kretchmar - Practical Philosophy of Sport and Physical Activity - 2nd (second) Edition: 2nd (second) Edition 666
Energy-Size Reduction Relationships In Comminution 500
Principles Of Comminution, I-Size Distribution And Surface Calculations 500
热门求助领域 (近24小时)
化学 医学 生物 材料科学 工程类 有机化学 内科学 生物化学 物理 计算机科学 纳米技术 遗传学 基因 复合材料 化学工程 物理化学 病理 催化作用 免疫学 量子力学
热门帖子
关注 科研通微信公众号,转发送积分 4941339
求助须知:如何正确求助?哪些是违规求助? 4207390
关于积分的说明 13077624
捐赠科研通 3986257
什么是DOI,文献DOI怎么找? 2182529
邀请新用户注册赠送积分活动 1198125
关于科研通互助平台的介绍 1110387