| 查看: 3441 | 回复: 24 | ||||||||||
| 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 | ||||||||||
xiejf专家顾问 (文学泰斗)
麦麦爸爸爱小牛
|
[交流]
Nature最新研究进展：无金属有机-无机液流电池 已有6人参与
|
|||||||||
|
最新一期的Nature杂志刊发了美国哈佛大学Michael J. Aziz课题组的最新研究进展，题为A metal-free organic–inorganic aqueous flow battery，介绍了一种新型的不含金属元素的有机-无机液流电池，实现了廉价且高能量密度的能源存储方式。 As the fraction of electricity generation from intermittent renewable sources—such as solar or wind—grows, the ability to store large amounts of electrical energy is of increasing importance. Solid-electrode batteries maintain discharge at peak power for far too short a time to fully regulate wind or solar power output1, 2. In contrast, flow batteries can independently scale the power (electrode area) and energy (arbitrarily large storage volume) components of the system by maintaining all of the electro-active species in fluid form3, 4, 5. Wide-scale utilization of flow batteries is, however, limited by the abundance and cost of these materials, particularly those using redox-active metals and precious-metal electrocatalysts6, 7. Here we describe a class of energy storage materials that exploits the favourable chemical and electrochemical properties of a family of molecules known as quinones. The example we demonstrate is a metal-free flow battery based on the redox chemistry of 9,10-anthraquinone-2,7-disulphonic acid (AQDS). AQDS undergoes extremely rapid and reversible two-electron two-proton reduction on a glassy carbon electrode in sulphuric acid. An aqueous flow battery with inexpensive carbon electrodes, combining the quinone/hydroquinone couple with the Br2/Br− redox couple, yields a peak galvanic power density exceeding 0.6 W cm−2 at 1.3 A cm−2. Cycling of this quinone–bromide flow battery showed >99 per cent storage capacity retention per cycle. The organic anthraquinone species can be synthesized from inexpensive commodity chemicals8. This organic approach permits tuning of important properties such as the reduction potential and solubility by adding functional groups: for example, we demonstrate that the addition of two hydroxy groups to AQDS increases the open circuit potential of the cell by 11% and we describe a pathway for further increases in cell voltage. The use of π-aromatic redox-active organic molecules instead of redox-active metals represents a new and promising direction for realizing massive electrical energy storage at greatly reduced cost. /  nature12909-f1.jpg |
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 : A_metal-free_organic–inorganic_aqueous_flow_battery.pdf
2014-01-09 21:47:12, 1.07 M
» 收录本帖的淘帖专辑推荐
 纳米化学/电化学综述 | 科技 | 综述类文章+前沿研究 | 深度情怀 |
| 精华 |
» 本帖已获得的红花（最新10朵）
zxp5887» 猜你喜欢
求调剂一志愿海大，0703化学学硕304分，有大创项目，四级已过
已经有10人回复
-
070300 求调剂
已经有1人回复
-
物理化学论文润色/翻译怎么收费?
已经有98人回复
-
深圳大学高等研究院赵伟课题组招收化学调剂生
已经有3人回复
-
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31人回复
-
化学工程085602 305分求调剂
已经有17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
» 本主题相关价值贴推荐，对您同样有帮助:
- 两篇最新锂电池高能正极材料的研究和UCLA dunn在Science上的一篇关于电化学储能的综述
已经有164人回复
- Nature Materials最新研究文章：用于先进锂电池的纳米结构高能电极材料
已经有319人回复
- 分享今日最新Nature文章：10nm以下金属纳米颗粒的等离子共振研究
已经有371人回复
0.8
| 顶一下，感谢分享！ |
6楼2014-01-10 03:28:00
求泊君
木虫 (小有名气)
- 应助: 5 (幼儿园)
- 金币: 2164.8
- 红花: 2
- 帖子: 208
- 在线: 99.9小时
- 虫号: 1342001
- 注册: 2011-07-10
- 性别: GG
- 专业: 无机纳米化学
2楼2014-01-09 22:10:22
0.8
| 顶一下，感谢分享！ |
3楼2014-01-09 22:35:45
0.8
|
感谢分享！ [ 发自手机版 http://muchong.com/3g ] |
4楼2014-01-09 23:08:11
