主题:一种混合超级电容器 -- 请专业人员评价一下 -- ct
各位,最近接触到下面的一个超级电容生产厂,生产“混合超级电容”。我理解(不懂电化学),是由于使用电极材料或结构的原因,该锂电池具有超级电容级的电容特性。如果指标如厂家声称,与磷酸铁锂电池相似的比能量,又具有超级电容(千法拉)的电容量,将是非常理想的混合动力或电动车电池。
但我总有些疑问,这种技术好像在学术刊物介绍比较多,作为产品比较少。如果真是这么优越,为什么韩国和日本的锂电池厂没有类似的产品呢(也许是我孤陋寡闻)?
内中不知有何玄机?请赐教,多谢。
http://zhuanli.baidu.com/pages/sipo/20091021/97/d6109d96d185736803febc02cfc3a06a_0.html
一种混合超级电容器
申请号/专利号: 200910219706
本发明公开了一种混合超级电容器,是由外壳、正极、负极、介于正负极之间的有机隔膜以及有机电解液组成,正极采用磷酸钒氧锂等含锂化合物、活性炭、导电炭黑、高分子粘结剂和铝箔;负极采用含锂化合物、导电炭黑、粘结剂和铜箔;有机电解液由含有锂离子的电解质盐和混合有机溶剂组成。本发明将锂离子电池与超级电容器的优势相结合,制造出具有锂离子电池高能量密度,超级电容器长寿命、高功率密度的混合超级电容器。由于负极采用钛酸锂材料以及改进了电解液组成,因此具有更高的寿命和安全性能。与超级电容器相比,本发明具有更高的能量密度,可以大幅度扩展其应用领域。特别适合电动自行车、电动汽车等领域使用,并在许多场合可替代铅酸电池。
申请日: 2009年11月03日
公开日: 2010年04月28日
授权公告日:
申请人/专利权人: 朝阳立塬新能源有限公司
申请人地址: 辽宁省朝阳市开发区黄河路五段
发明设计人: 李荐;李国君
专利代理机构: 沈阳科苑专利商标代理有限公司
代理人: 卜海慧
专利类型: 发明专利
分类号: H01G9/155;H01G9/038;H01G9/058
点此查看跟该专利相关的 主附图\公开说明书\授权说明书
俺就拍个脑子,凭直觉感觉像是忽悠。当然我没什么证据。
我隐约记得,看到过好多什么永动机,宇宙能的“专利”都是有专利号/专利申请号,并且都可以在知识产权局查到,其实只是受理申请而已。
实用新型和外观这类相对发明专利审批程序要容易些
刚查了一下:
专利类型是发明专利,需要经过受理,初审,公布,实质审查,授权。
估计通过实质审查是要有真家伙的,时间也比较长
前几天刚去过那里,朝阳是国家超级电容器项目所在地,不过开发区里的企业也是干什么的都有。
至于专利上说的东东,我摘一段Maxwell公司的产品说明中的Theory部分:
Electrochemical double layer capacitors (EDLCs) are similarly known as supercapacitors or ultracapacitors. An ultracapacitor stores energy electrostatically by polarizing an electrolytic solution. Though it is an electrochemical device there are no chemical reactions involved in its energy storage mechanism. This mechanism is highly reversible, allowing the ultracapacitor to be charged and discharged hundreds of thousands to even millions of times.
An ultracapacitor can be viewed as two non-reactive porous plates suspended within an electrolyte with an applied voltage across the plates. The applied potential on the positive plate attracts the negative ions in the electrolyte, while the potential on the negative plate attracts the positive ions. This effectively creates two layers of capacitive storage, one where the charges are separated at the positive plate, and another at the negative plate.
Conventional electrolytic capacitors storage area is derived from thin plates of flat, conductive material. High capacitance is achieved by winding great lengths of material. Further increases are possible through texturing on its surface, increasing its surface area. A conventional capacitor separates its charged plates with a dielectric material: plastic, paper or ceramic films. The thinner the dielectric the more area can be created within a specified volume. The limitations of the thickness of the dielectric define the surface area achievable.
An ultracapacitor derives its area from a porous carbon-based electrode material. The porous structure of this material allows its surface area to approach 2000 square meters per gram, much greater than can be accomplished using flat or textured films and plates. An ultracapacitors charge separation distance is determined by the size of the ions in the electrolyte, which are attracted to the charged electrode. This charge separation (less than 10 angstroms) is much smaller than can be accomplished using conventional dielectric materials.
The combination of enormous surface area and extremely small charge separation gives the ultracapacitor its outstanding capacitance relative to conventional capacitors.
电荷不能长时间存储。