| 查看: 3384 | 回复: 34 | ||||
[交流]
PVP在制备锂硫电池电极材料里做分散剂，提高了电池性能
|
||||
|
PVP通常会用于表面活性剂或者分散剂，有助于分散获得更小粒径的纳米材料。这篇论文采用PVP分散硫化锂和炭黑的体系，使得两者可以结合，并且相互有良好分散性。直接上摘要~~~ The lithium−sulfur (Li−S) battery is a great alternative to the state-of-the-art lithium ion batteries due to its high energy density. However, low utilization of active materials, the insulating nature of sulfur or lithium sulfide (Li2S), and polysulfide dissolution in organic liquid electrolyte lead to low initial capacity and fast performance degradation. Herein, we propose a facile and viable approach to address these issues. This new approach entails synthesis of Li2S/carbon black (Li2S/CB) cores encapsulated by a nitrogendoped carbon shell with polyvinylpyrrolidone (PVP) assistance. Combining energy-filtered transmission electron microscopy (EFTEM) elemental mappings, XPS and FTIR measurements, it is confirmed that the as-synthesized material has a structure of a Li2S/CB core with a nitrogen-doped carbon shell (denoted as Li2S/CB@ NC). The Li2S/CB@NC cathode yields an exceptionally high initial capacity of 1020 mAh/g based on Li2S mass at 0.1 C with stable Coulombic efficiency of 99.7% over 200 cycles. Also, cycling performance shows the capacity decay per cycle as small as 0.17%. Most importantly, to further understand the materials for battery applications, field emission transmission electron microscopy (FETEM) and elemental mapping tests without exposure to air for Li2S samples in cycled cells are reported. Along with the first ever FETEM and field emission scanning electron microscopy (FESEM) investigations of cycled batteries, Li2S/CB@NC cathode demonstrates the capability of robust core−shell nanostructures for different rates and improved capacity retention, revealing Li2S/CB@NC designed here as an outstanding system for high-performance lithium−sulfur batteries. |
回复此楼» 本帖附件资源列表
-
欢迎监督和反馈：小木虫仅提供交流平台，不对该内容负责。
本内容由用户自主发布，如果其内容涉及到知识产权问题，其责任在于用户本人，如对版权有异议，请联系邮箱：xiaomuchong@tal.com - 附件 1 : PVP-Assisted_Synthesis_of_Uniform_Carbon_Coated_Li2S_CB_for_HighPerformance_Lithium−Sulfur_Batteries.pdf
2016-02-26 12:00:02, 647.87 K
» 收录本帖的淘帖专辑推荐
 锂硫电池 |
» 猜你喜欢
各位大神，目前国内有哪些比较好用的逆合成软件？
已经有14人回复
-
国社科系统bug了，是不是要放榜了？
已经有10人回复
-
现代”学阀”该如何界定
已经有9人回复
-
课题组招2027级博士 上海工程技术大学 激光智能制造方向
已经有4人回复
-
上海工程技术大学 激光智能制造课题组 2027级博士研究生招生
已经有3人回复
-
上海工程技术大学激光智能制造课题组｜2027级博士研究生招生公告
已经有11人回复
-
申博发邮件
已经有11人回复
-
我的奶奶
已经有3人回复
» 本主题相关商家推荐: (我也要在这里推广)
6楼2016-02-29 12:55:31
★
寒潭无影(金币+1): 谢谢参与
寒潭无影(金币+1): 谢谢参与
|
本帖内容被屏蔽 |
24楼2016-02-29 13:33:28
★
寒潭无影(金币+1): 谢谢参与
寒潭无影(金币+1): 谢谢参与
|
本帖内容被屏蔽 |
25楼2016-02-29 13:33:42
27楼2016-02-29 13:42:14
32楼2016-02-29 14:54:17
33楼2016-10-14 16:37:07
35楼2017-06-30 06:49:19
简单回复
宝贝乖乖快来2楼
2016-02-29 12:30
回复
寒潭无影(金币+1): 谢谢参与
祝福
宝贝乖乖快来3楼
2016-02-29 12:30
回复
祝福
nono20094楼
2016-02-29 12:32
回复
寒潭无影(金币+1): 谢谢参与
tzynew5楼
2016-02-29 12:34
回复
寒潭无影(金币+1): 谢谢参与
chentao7楼
2016-02-29 12:59
回复
寒潭无影(金币+1): 谢谢参与
2016-02-29 13:01
回复
寒潭无影(金币+1): 谢谢参与
小德必胜9楼
2016-02-29 13:03
回复
寒潭无影(金币+1): 谢谢参与
感谢分享 发自小木虫Android客户端
Sammy210楼
2016-02-29 13:04
回复
寒潭无影(金币+1): 谢谢参与
hedaos11楼
2016-02-29 13:06
回复
寒潭无影(金币+1): 谢谢参与
laozhu557212楼
2016-02-29 13:06
回复
寒潭无影(金币+1): 谢谢参与
yanlangw13楼
2016-02-29 13:08
回复
寒潭无影(金币+1): 谢谢参与
支持
jeangong14楼
2016-02-29 13:09
回复
寒潭无影(金币+1): 谢谢参与
douwangj15楼
2016-02-29 13:14
回复
寒潭无影(金币+1): 谢谢参与
hydzp16楼
2016-02-29 13:20
回复
寒潭无影(金币+1): 谢谢参与
a
renqingyao17楼
2016-02-29 13:21
回复
寒潭无影(金币+1): 谢谢参与
祝福
zhenwuhuang18楼
2016-02-29 13:23
回复
寒潭无影(金币+1): 谢谢参与
yukaiv19楼
2016-02-29 13:23
回复
寒潭无影(金币+1): 谢谢参与
祝福
zhoushanqun20楼
2016-02-29 13:23
回复
寒潭无影(金币+1): 谢谢参与
祝福 发自小木虫IOS客户端
shwkfd21楼
2016-02-29 13:24
回复
寒潭无影(金币+1): 谢谢参与
祝福 发自小木虫IOS客户端
amberblue22楼
2016-02-29 13:26
回复
dingsuanglin23楼
2016-02-29 13:33
回复
寒潭无影(金币+1): 谢谢参与
支持 发自小木虫Android客户端
duanhek26楼
2016-02-29 13:36
回复
寒潭无影(金币+1): 谢谢参与
祝福
yejinshi28楼
2016-02-29 13:42
回复
寒潭无影(金币+1): 谢谢参与
祝福 发自小木虫IOS客户端
漠漠烟雨29楼
2016-02-29 13:42
回复
寒潭无影(金币+1): 谢谢参与
祝福 发自小木虫IOS客户端
feinuanx30楼
2016-02-29 13:51
回复
寒潭无影(金币+1): 谢谢参与
支持
yuzhuce31楼
2016-02-29 13:54
回复
寒潭无影(金币+1): 谢谢参与
苦苦的锂电人34楼
2017-06-26 11:32
回复
