Electrospun-nanofibrous Redox-active separator for enhancing the capacity of Lithium-ion batteries
发布时间:2023-01-30点击次数:
-
DOI码:10.1016/j.ces.2022.117873
-
发表刊物:Chemical Engineering Science
-
关键字:Redox-active separator;Lithium-ion battery;Nanofiber;Electrospinning;In-situ polymerization
-
摘要:Separator is a key component of lithium-ion battery (LIB), and a redox-active separator can enhance the capacity of LIB by participating in battery reactions. This paper reports a redox-active separator based on Fe(CN)64- doped polypyrrole (PPy) composite nanofibers fabricated by electrospinning and in-situ polymerization. The separator is composed of one layer of Polyacrylonitrile (PAN)@doped-PPy core–shell structured nanofibers and another layer of PAN nanofibers. The porosity, electrolyte uptake, and ionic conductivity of the optimized redox-active separator are 79.3 7.1%, 294.6 31.5%, and 1.57 0.06 mS∙cm−1, respectively. These values are greater than those of a commercial PP separator, 41%, 81.5 17.4%, and 0.75 0.02 mS∙cm−1, respectively. Accordingly, the discharge capacity of the battery cell with the redox-active separator is up to 158.7–227.0 mAh∙g−1 at the current rates of 2.0–0.2C, outperforming conventional inert separators. The enhanced battery capacity is stemmed from the redox activity of the doped-PPy polymer, as evidenced by the wider cathodic and anodic peaks in the cyclic voltammetry. In addition, the battery cells tested with redox-active separators show gravimetric energy densities of up to 103.0 mAh∙g−1, which is 56.1% and 27.2% greater than those of a commercial PP separator and the redox-active separator reported in the literature.
-
论文类型:期刊论文
-
论文编号:117873
-
卷号:260
-
是否译文:否
-
发表时间:2022-10-12
-
收录刊物:SCI、EI
-
发布期刊链接:https://www.sciencedirect.com/science/article/pii/S0009250922004572
+
俞和胜
职务:Professor
主要任职:
个人信息
- 教授
博士生导师
硕士生导师 - 教师拼音名称:yuhesheng
- 电子邮箱:
- 所在单位:化工学院
- 职务:Professor
- 办公地点:中国矿业大学文昌校区综合楼203
- 性别:男
- 学位:博士
- 职称:教授
- 毕业院校:加拿大滑铁卢大学
学术荣誉:
- 2020当选:江苏特聘教授
曾获荣誉:
- 2020-08-01江苏特聘教授
- 2014-10-15加拿大国家自然科学基金工业博士后奖学金
- 2020-08-01中国矿业大学“高端人才计划”攀登学者
- 2019-06-01江苏省“六大人才高峰”高层次人才
- 2018-06-28江苏省“双创博士”
- 2016-08-01AIChE Journal Editor’s Choice Paper
其他联系方式
- 邮编:
- 通讯/办公地址:
- 邮箱: