24小时热门版块排行榜

>论坛更新日志 (3303)
>虫友互识 (1483)
>休闲灌水 (702)
>导师招生 (74)
>文献求助 (55)
>论文道贺祈福 (28)
>基金申请 (28)
>论文投稿 (28)
>硕博家园 (26)
>考博 (26)
>微米和纳米 (25)
>考研 (25)
>博后之家 (23)
>教师之家 (20)
>公派出国 (17)
>找工作 (14)

返回列表

当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖

燕子206

银虫 (小有名气)

应助: 0 (幼儿园)
金币: 79.9
散金: 35
红花: 1
帖子: 101
在线: 40.5小时
虫号: 552691
注册: 2008-04-30
专业: 电化学

[交流] 【求助】二氧化锰在锂空气电池中起什么作用呢已有7人参与

二氧化锰在锂空气电池中起什么作用呢？文献上都说是作为催化剂，具体是起什么作用呢

回复此楼

» 猜你喜欢

锂离子电池循环寿命衰减过快，求机理分析与改进思路已经有2人回复
求博导收留已经有6人回复
物理化学论文润色/翻译怎么收费? 已经有193人回复
CSC & MSCA 博洛尼亚大学能源材料课题组博士/博士后招生｜MSCA经费充足、排名优已经有6人回复
德国Karlsruhe Institute of Technology招收电化学储能及联合培养CSC博士等已经有20人回复
德国Karlsruhe Institute of Technology招收电化学储能及联合培养CSC博士已经有23人回复
德国Karlsruhe Institute of Technology招收电化学储能及联合培养CSC博士已经有1人回复
固态锂金属电池迁移数计算求助已经有1人回复
荷兰奈梅亨大学赵文博与Galimberti课题组招收理论计算CSC博士 2000 欧元/月+房补已经有0人回复
26储能博士申请自荐已经有22人回复
上海交通大学--宁波东方理工大学电池方向博士招生已经有10人回复

1楼 2010-11-05 09:31:18

已阅回复此楼关注TA 给TA发消息送TA红花 TA的回帖

dwkong

木虫 (正式写手)

ECEPI: 1
应助: 20 (小学生)
金币: 4029.3
散金: 538
红花: 2
帖子: 684
在线: 178.8小时
虫号: 489653
注册: 2008-01-02
专业: 电化学

燕子206(金币+1): 2010-11-21 16:27:31

The common way to prepare
MnO2-catalyzed carbon is the mixing of a manganese salt and
potassium permanganate solutions in the presence of suspended
carbon substrate (2MnO4
? +3Mn2+ +2H2O→5MnO2 +4H+). The
porosity of the carbon substrate does not remain unchanged in
course of this process. The substrate undergoes modification due
to the reaction between the carbon and permanganate. As a result
of this reaction, some of closed pores turn to be opened, and some
open pores turn to be widened. This effect may be particularly
distinct after the catalyzed substrate thermo-treatment.
As-deposited MnO2 particles camouflage the pore orifices, but the
oxide particles undergo dehydration being heated, and thus shrink
and expose more carbon pore volume. This MnO2-catalized carbon
substrate behavior was demonstrated in the study of Cheng
et al. [36], which has revealed that charge capacity of the carbon,
catalyzed in KMnO4/MnSO4-process, was superior to the charge
capacity of the same carbon catalyzed by mixing with MnO2-
powder. Also it was found that the thermo-treatment (300 ?C)
enhanced the charge capacity of the KMnO4/MnSO4-catalyzed carbon;
the latter may be understood as the result of dehydration –
and hence shrinking – of KMnO4/MnSO4-prepared MnO2 particles
(MnO2 ×1.3H2O300 ?C→MnO2 ×0.26H2) [40].

引用回帖:

Originally posted by 燕子206 at 2010-11-05 09:31:18:
二氧化锰在锂空气电池中起什么作用呢？文献上都说是作为催化剂，具体是起什么作用呢