| 查看: 1814 | 回复: 11 | ||||
| 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 | ||||
coolyuruizhi金虫 (小有名气)
|
[交流]
JMCA 上面的一篇聚苯胺包覆富锂的文章 已有6人参与
|
|||
|
In situ polyaniline modified cathode material Li[Li0.2Mn0.54Ni0.13Co0.13]O2 with high rate capacity for lithium ion batteries Lithium-rich layered Li[Li0.2Mn0.54Ni0.13Co0.13]O2 is prepared by a fast co-precipitation method and surface modified with conducting polyaniline (PANI, 5 wt%, 10 wt%, 15 wt%, 20 wt%, 30 wt% theoretically) via in situ chemical oxidation polymerization to optimize the electrochemical properties. The uniform PANI layer with a thickness of 5 nm (10 wt%) has been successfully coated on the surface of Li[Li0.2Mn0.54Ni0.13Co0.13]O2 particles, as observed by field-emission scanning electron microscopy (FESEM) and high resolution transmission electron microscopy (HRTEM). The X-ray powder diffraction (XRD) results show that all the prepared samples have a typical layered hexagonal a-NaFeO2 structure. The PANI layer maintains the integrity of the surface material crystal structure of the Li[Li0.2Mn0.54Ni0.13Co0.13]O2 particles by protecting the electrodes from external erosion during continuous charge–discharge cycles. PANIcoated Li[Li0.2Mn0.54Ni0.13Co0.13]O2 electrodes present excellent electrochemical properties at room temperature. The initial discharge capacity is 313.5 mA h g 1 (0.05 C) with a coulombic efficiency of 89.01% (PANI, 10 wt%), compared with 291.9 mA h g 1 (0.05 C) for the pristine Li[Li0.2Mn0.54Ni0.13Co0.13]- O2 with a coulombic efficiency of 81.31% in the potential range 2.0–4.8 V (vs. Li/Li+). The discharge capacity is retained at 282.1 mA h g 1 after 80 cycles at 0.1 C. Moreover, the PANI-coated Li [Li0.2Mn0.54Ni0.13Co0.13]O2 exhibits an excellent high rate capacity of 198.6 mA h g 1 at 10 C. The electrochemical impedance spectra (EIS) measurements reveal that the thin PANI coating layer significantly optimizes the interfacial electrochemical reaction activity by reducing the charge transfer resistance. Moreover, the special H +/Li+ exchange reaction during the proton acid doping procedure also promotes the improvement of the electrochemical performance |
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 : 2014-In_situ_polyaniline_modified_cathode_material_LiLi0.2Mn0.54Ni0.13Co0.13O2_with_high_rate_capacity_for_lithium_ion_batteries.pdf
2014-11-05 20:26:53, 1.73 M
» 收录本帖的淘帖专辑推荐
 锂论 论锂 |
» 猜你喜欢
青岛大学固态电池研究团队招收材料、化学、物理等方向博士研究生
已经有33人回复
-
化学工程085602 305分求调剂
已经有22人回复
-
分析化学论文润色/翻译怎么收费?
已经有189人回复
-
龋病与牙周病的表述
已经有1人回复
-
070300化学求调剂
已经有12人回复
-
武汉纺织大学全国重点实验室杨应奎教授团队拟招17-19位硕博生！
已经有0人回复
-
材料与化工专硕接受跨专业调剂（重庆市属高校）
已经有0人回复
-
武汉纺织大学全国重点实验室杨应奎教授团队拟招17-19位硕博生！
已经有0人回复
-
070300 化学学硕 初试357分 b区求调剂
已经有1人回复
-
上海工程技术大学生态与功能纺织品开发研究团队招收学硕专硕研究生
已经有0人回复
-
华南理工0703求调剂，总分336四六级已过
已经有0人回复
» 本主题相关价值贴推荐，对您同样有帮助:
- 聚苯胺包覆无机物后的XRD为什么没有聚苯胺的峰？
已经有7人回复
- 【求助】关于聚苯胺包覆实验
已经有10人回复
7楼2014-11-06 22:40:48
0.8
| 顶一下，感谢分享！ |
2楼2014-11-05 21:10:15
0.8
| 顶一下，感谢分享！ |
3楼2014-11-05 22:46:07
0.8
| 顶一下，感谢分享！ |
4楼2014-11-06 07:28:40
