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type="text/css"></style> <div id="ct" class="ct2 wp cl"> <div class="mn"> <div class="bm_haa cl"> <div class="bm_h cl"> <a href="http://www.oecr.com/portal.php?mod=rss&catid=62" class="y xi2 rss" target="_blank" title="RSS">订阅</a><h1 class="xs2">文章</h1> </div></div> <div class="kjkjb"> <div class="bm vw" style="margin-bottom:0;"> <div class="h hm"> <div class="zxtoux"><img src="http://www.oecr.com/uc_server/avatar.php?uid=54876&size=small" /></div> <h1 class="ph">康奈尔大学开发可瞬时充电的螺旋形电池结构 </h1> <p class="xg1"> 时间：2018-5-22 10:04<a class="zz" href="home.php?mod=space&uid=54876">作者：update</a> 阅读<em id="_viewnum">(786)</em> 评论: <a href="http://www.oecr.com/portal.php?mod=comment&id=6652&idtype=aid" title="查看全部评论"><em id="_commentnum">5</em></a></p> <div class="zxfb" ><a href="http://www.oecr.com/portal.php?mod=rss&catid=62" class="y xi2 rss" target="_blank" title="RSS">订阅</a></div> </div> <!--[diy=diysummarytop]--><div id="diysummarytop" class="area"></div><!--[/diy]--> <div class="s"> <div class="ss"><div><span>导读： </span>当前的许多电池，都采用了大同小异的阴阳双电极结构，中间采用了非导体隔离。不过现在，康奈尔大学的工程师们开发出了一种不同寻常的新结构，因其采用了相互交织的旋涡状结构、并且拥有瞬时充电的特性。</div> </div> <!--[diy=diysummarybottom]--><div id="diysummarybottom" class="area"></div><!--[/diy]--> <div class="d"> <!--[diy=diycontenttop]--><div id="diycontenttop" class="area"></div><!--[/diy]--> <table cellpadding="0" cellspacing="0" class="vwtb"><tr><td id="article_content"><div> 当前的许多电池，都采用了大同小异的阴阳双电极结构，中间采用了非导体隔离。不过现在，康奈尔大学的工程师们开发出了一种不同寻常的新结构，因其采用了相互交织的旋涡状结构、并且拥有瞬时充电的特性。这项新技术基于一套复杂的多孔形状 —— 螺旋 24 面体（gyroid）—— 在此之前，它经常被用于制造“二维奇迹<a href="http://material.oecr.com" target="_blank" class="relatedlink">材料</a>”石墨烯。</div><div><br></div><div><p style="text-align: center;"><a href="data/attachment/portal/201805/22/100325q49o6k1d9dd9do4k.jpg" target="_blank"><img src="data/attachment/portal/201805/22/100325q49o6k1d9dd9do4k.jpg"></a></p></div><div><br></div><div style="text-align: center;"> 康奈尔大学开发的螺旋形电池想象图</div><div><br></div><div> 此外，新电池还采用了超薄碳膜（尽管还没法和石墨烯相提并论），借助了一种称作“块状共聚合物”（block co-polymer）的自组装<a href="http://optics.oecr.com" target="_blank" class="relatedlink">工艺</a>。</div><div><br></div><div> 这种碳基螺旋 24 面体组成了电池的阳极，其中包含了数千个孔，每个孔大约有 40nm 宽。</div><div><br></div><div> 这些气孔被涂上了大约 10nm 厚的分离层、接着加入硫阴极、最后用一种叫做 PEDOT 的导电聚合物来填充最后一部分空隙。</div><div><br></div><div> 每个细孔都可以储存和传递能量，与微型电池很是类似。但通过将它们分散到螺旋体的巨大表面积上，新架构的能量密度，比传统电池设计要大得多。</div><div><br></div><div> 研究人员称，在实际操作中，这意味着电池可以在几秒钟、甚至更快的时间内完成充电！首席研究员 Ulrich Wiesner 表示：</div><div><br></div><div> 这种三维结构，基本上消除了设备中的所有容积损耗。</div><div><br></div><div> 更重要的是，相互渗透的领域缩小到了<a href="http://material.oecr.com" target="_blank" class="relatedlink">纳米</a>尺度，所以我们才能指数般提升能量密度。</div><div><br></div><div> 换言之，与传统电池结构相比，你可以在更短的时间内获得能量。</div><div><br></div><div><p style="text-align: center;"><a href="data/attachment/portal/201805/22/100400dtxr2r0pxjrz0wsi.jpg" target="_blank"><img src="data/attachment/portal/201805/22/100400dtxr2r0pxjrz0wsi.jpg"></a></p></div><div><br></div><div> 即便如此，新设计也不是没有缺陷。当电池在充放电时，硫会发生膨胀、而 PEDOT 部分不会。随着时间的推移，后者会逐渐发生损耗。Wiesner 指出：</div><div><br></div><div> 当硫膨胀的时候，这些微小的聚合物会被撕成碎片。当它再次收缩时，无法重新连接。这意味着 3D 电池的一部分无法再被利用到。</div><div><br></div><div> 当前团队正在努力搞定这个问题，同时寻求一项关于概念验证的专利。有关这项研究的详情，已经发表在近日出版的《能源与环境科学》（Energy & Environment Science）期刊上，原标题为：</div><div><br></div><div> 《Block copolymer derived 3-D interpenetrating multifunctional gyroidal nanohybrids for electrical energy storage》</div><div><br></div><div><p microsoft="" yahei",="" simsun;="" background-color:="" rgb(255,="" 255,="" 255);="" text-align:="" center;"="" center;="" 255);"="" style="text-align: center; word-wrap: normal; margin: 0px; padding: 0px; color: rgb(143, 143, 143); font-family: Tahoma, "Microsoft Yahei", Simsun; background-color: rgb(255, 255, 255);"><b style="word-wrap: normal;"><font size="5" style="word-wrap: normal;">欢迎关注OECR公众号</font></b></p><p microsoft="" yahei",="" simsun;="" background-color:="" rgb(255,="" 255,="" 255);="" text-align:="" center;"="" center;="" 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