| 查看: 1922 | 回复: 5 | ||||
| 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 | ||||
穿越千年版主 (著名写手)
寂寞读书的小和尚
|
[交流]
Thermoelectric Material to Hit Market Later This Year 已有2人参与
|
|||
|
California-based Alphabet Energy plans to begin selling a new type of material that can turn heat into electricity. Unlike previous thermoelectrics, as such materials are known, it is abundant, cheap, and nontoxic. Thermoelectric materials can turn a temperature difference into electricity by exploiting the flow of electrons from a warmer area to a cooler one. Thus, they can theoretically turn waste heat into a power source. But an efficient thermoelectric material has to conduct electricity well without conducting heat well, because otherwise the temperature across the material would soon equalize. Most materials that are good electrical conductors are also good thermal conductors, and the few materials researchers have been able to develop with good thermoelectric properties have been rare, expensive, or toxic. Alphabet Energy’s solution is tetrahedrite: an abundant, naturally occurring mineral that also happens to be more efficient on average than existing thermoelectric materials. Ali Shakouri, a professor of electrical and computer engineering at Purdue University, says that tetrahedrite has promise because it doesn’t require the expensive up-front manufacturing that other materials require. “I think that’s kind of quite unique in thermoelectrics,” Shakouri says. “People look at so many materials, but the starting point has always been pure materials that they synthesize together.” The fact that it’s abundant is another big plus, says MIT professor Mildred Dresselhaus. Other materials are made from elements so rare that they wouldn’t be available for widespread use. According to data released by Alphabet Energy, tetrahedrite costs about $4 per kilogram, whereas other thermoelectric materials cost between $24 and $146 per kilogram. For now, the company is focusing on stand-alone generators, but founder and CEO Matt Scullin says it’s currently working with car companies to see if tetrahedrite can be used to harness heat from car exhaust. Scullin says that other thermoelectric materials have typically achieved about 2.5 percent efficiency in cars, but tetrahedrite could reach 5 to 10 percent efficiency. “These aren’t incremental improvements,” he says. “They’re really huge improvements that make really significant impact.” |
回复此楼» 收录本帖的淘帖专辑推荐
 新能源 |
» 猜你喜欢
FileCode能看出啥？
已经有15人回复
-
filecode
已经有8人回复
-
确定了，国自然21号放榜
已经有7人回复
-
帮忙看看fileCode
已经有5人回复
-
综述论文作为代表作会不会影响评审专家的印象分？
已经有11人回复
-
关于代码变化问题，想知道的进来
已经有24人回复
-
为什么网上很多人说本周 12号出结果
已经有3人回复
-
静等基金结果
已经有16人回复
-
我的国基提前知道中了，可是同事的操作让我实在接受不了，怎么会有这样的人
已经有11人回复
-
关于Filecode分析方法
已经有3人回复
穿越千年
版主 (著名写手)
寂寞读书的小和尚
- FPI: 2
- 应助: 238 (大学生)
- 贵宾: 0.515
- 金币: 9996.1
- 散金: 8750
- 红花: 119
- 沙发: 10
- 帖子: 2398
- 在线: 1369.1小时
- 虫号: 1393528
- 注册: 2011-09-07
- 性别: GG
- 专业: 半导体材料
- 管辖: 功能材料
|
Could you provide some papers on Tetrahedrite? As you said, the time of preparation is too long, which is similar to the situation for filled-skutterudite. I had ever read a paper about synthesising F-S by melt spinning method which can largely cut the processing time. Maybe it is also suitable for preparing Tetrahedrite. |
5楼2014-10-21 09:25:19
mihongxing
木虫 (小有名气)
- 应助: 0 (幼儿园)
- 金币: 1582
- 红花: 2
- 帖子: 155
- 在线: 194.5小时
- 虫号: 1448948
- 注册: 2011-10-18
- 专业: 无机非金属类光电信息与功
2楼2014-10-20 08:54:48
穿越千年
版主 (著名写手)
寂寞读书的小和尚
- FPI: 2
- 应助: 238 (大学生)
- 贵宾: 0.515
- 金币: 9996.1
- 散金: 8750
- 红花: 119
- 沙发: 10
- 帖子: 2398
- 在线: 1369.1小时
- 虫号: 1393528
- 注册: 2011-09-07
- 性别: GG
- 专业: 半导体材料
- 管辖: 功能材料
3楼2014-10-20 09:13:30
★
小木虫: 金币+0.5, 给个红包，谢谢回帖
小木虫: 金币+0.5, 给个红包，谢谢回帖
|
Tetrahedrite is a good thermoelectric material. Now, its peak ZT is 1.5 which doped with Mn. There are not many researchers focusing on this material. So, I think its ZT value can be improved heavily. The main problem is that the time of preparation for reprocessing is too long. It takes more than 2 weeks. So, if someone could find a new method to increase the reprocessing time, it wold be a great contribution. |
4楼2014-10-21 07:34:42
