Safe, fast
Carefully introducing new materials into the design of today’s lithium-ion batteries has the potential to greatly improve their performance, and scientists have just happened upon a promising possibility in carbon nanotubes. By incorporating these materials into the electrode of a lithium metal battery, the researchers have produced a version that is not only safer, but has the potential to charge up in just a fraction of the time of conventional devices.
The research was carried out at Texas A&M University’s College of Engineering and centers on a battery architecture with huge potential. When a traditional lithium-ion battery charges and discharges, the lithium ions are ferried back and forth between the cathode and anode, the latter of which is usually made from a mix of graphite and copper.
But scientists see a great alternative in using pure lithium metal instead, which offers very high energy density and could make for batteries that charge much faster and offer as much as 10 times the capacity. One study last year described a lithium anode as “critical to break the energy density bottleneck of current li-ion chemistry." Suffice to say, there is considerable interest in making these things work.
Standing in the way, however, are dangly tentacles called dendrites. These tree-like structures build up on the surface of the anode when lithium ions aren’t evenly deposited and as they grow, they can pierce key components of the battery and cause it to short circuit and or catch fire. If that doesn’t occur, they cause the battery to quickly lose its charge anyway.
So a great deal of research centers on the problem of dendrite formation, and the Texas A&M team believes it may have found a solution in ultralight and highly conductive carbon nanotubes. The design mirrors that of another experimental battery we looked at in 2018 that uses a thin carbon nanotube film to effectively suffocate dendrites before they properly take shape, but the researchers behind the new study have taken a slightly different approach.
For its anode, the team used carbon nanotubes to build three-dimensional porous scaffolds laced with molecules that cause the lithium ions to bind to its surface. It took some experimentation, but with the right concentration of these binding molecules, the team found it had produced a battery anode that avoided the buildup of dendrites on its surface.
(责任编辑:新闻中心)
-
The world's largest single-capacity floating wind platform has set to sea and the builder released i ...[详细]
-
记者从镇江路街道办事处了解到,今年区财政拨款300余万元,分别对镇江路街道辖区内北仲三路、人民路的部分老旧楼院进行改造提升。施工内容主要包含外墙保温、公共楼梯间内墙粉饰、落水管整修、落水斗更换、墙面管 ...[详细]
-
食品+二次元?又一个万亿级产业正在崛起!_南方+_南方plus二次元食品联盟成立、全网征集菜品、专家讨论行业发展......近期,“二次元食品”这一概念火出圈。当人类每日生活刚需与新潮二维概念两相融合 ...[详细]
-
市场体量稳定增长,腊味行业成食品巨头竞技场 | 年度食品观察_南方+_南方plus元旦过后,春节临近,腊味行业正迎来一年中最为火热的销售旺季。为了先声夺人,抢得消费市场,许多腊味传统产区纷纷举行腊味主 ...[详细]
-
How to watch 'Kinds of Kindness': When is it streaming?
Table of ContentsTable of ContentsThe best streaming deals to watch 'Kinds of Kindness':BEST FOR NEW ...[详细] -
香港,上海, 2016年10月27日 - 中国平安保险(集团)股份有限公司(以下简称「中国平安」、「平安」或「集团」,股票代号:香港证券交易所 2318,上海证券交易所 601318)公布其截至201 ...[详细]
-
“现在已经开始上色了,第一批500多盆元旦前就能上市了。”近日,在平度市古岘镇蔬菜专业合作社的阳光智能棚里,59岁的社员姜泽春正捧着花盆里的葡萄查看成熟情况。错落有致的花架上整 ...[详细]
-
雅安日报/北纬网讯据《四川省总河长办公室关于对四川省水电站下泄生态流量整改情况的通报》以下简称:《通报》)显示,截至目前,我市水电站下泄生态流量整改工程设施完成情况位居全省前列,在线监测完成情况排名全 ...[详细]
-
South Korean table tennis player Shin Yu-bin eats a banana before her women's singles semifinal ...[详细]
-
渚涜繃浜庢眰杩涘彛缇婅倝澧炲姞 闈掑矝浠婂啲缇婅倝浠蜂笉鍗囧弽闄峗涓浗灞变笢缃慱闈掑矝
銆€銆€鍜屽線骞翠竴鍒板啲瀛g緤鑲変环鏍间笂鎵笉鍚岋紝浠婂勾鐨勭緤鑲変环鏍兼瘮杈冧翰姘戙€傛槰鏃ワ紝璁拌€呰蛋璁垮彂鐜帮紝鏈€杩戞垜甯傜緤鑲夊競鍦洪噺澧炰环璺岋紝鎶氶『璺壒鍙戝競鍦虹洰鍓嶇殑鎵瑰彂 ...[详细]