为量化评价新能源汽车动力电池回收利用过程的环境效益,为报废动力电池管理体系和回收再利用相关标准的完善提供支撑,助力国家“双碳”目标的实现,以三元锂电池为研究对象,选取典型的动力电池回收利用场景,将三元锂电池的生命周期划分为...为量化评价新能源汽车动力电池回收利用过程的环境效益,为报废动力电池管理体系和回收再利用相关标准的完善提供支撑,助力国家“双碳”目标的实现,以三元锂电池为研究对象,选取典型的动力电池回收利用场景,将三元锂电池的生命周期划分为4个阶段:原材料获取、制造装配、使用和报废回收,并建立相应的GaBi模型,基于湿法回收A、湿法回收B、火法-湿法联合回收3种不同回收利用方式进行三元锂电池生命周期评价模型搭建与回收再利用过程减碳成效测算。研究结果表明,三元锂电池回收再利用过程有较好的减碳成效,基于3种不同回收工艺的三元锂电池回收再利用可以减少CO_(2)排放量分别为:湿法回收A为60.71kgCO_(2)/kWh;湿法回收B为150.00kgCO_(2)/kWh;火法-湿法联合回收为153.57 kg CO_(2)/kWh。基于这3种不同回收工艺的CO_(2)减排效果从优至劣依次为:湿法-火法联合回收、湿法回收B和湿法回收A。合理的动力电池回收利用方式可以显著减少其回收利用过程中的碳排放量,从而产生更好的环境效益。展开更多
Quantum spin Hall （QSH） insulators with a large topologically nontrivial bulk gap are crucial for future applications of the QSH effect. Among these, group III-V monolayers and their halides, which have a chair stru...Quantum spin Hall （QSH） insulators with a large topologically nontrivial bulk gap are crucial for future applications of the QSH effect. Among these, group III-V monolayers and their halides, which have a chair structure （regular hexagonal framework）, have been widely studied. Using first-principles calculations, we formulate a new structure model for the functionalized group III-V monolayers, which consist of rectangular GaBi-X2 （X = I, Br, C1） monolayers with a distorted hexagonal framework （DHF）. These structures have a far lower energy than the GaBi-X2 monolayers with a chair structure. Remarkably, the DHF GaBi-X2 monolayers are all QSH insulators, which exhibit sizeable nontrivial band gaps ranging from 0.17 to 0.39 eV. The band gaps can be widely tuned by applying different spin-orbit coupling strengths, resulting in a distorted Dirac cone.展开更多
At2g23470是拟南芥功能未知结构域DUF647蛋白家族的一个成员。为了研究At2g23470基因的功能,需要获得At2g23470功能缺失的突变体材料。根据拟南芥信息资源网站(The Arabidopsis Information Resource,TAIR)上公布的At2g23470基因可利用...At2g23470是拟南芥功能未知结构域DUF647蛋白家族的一个成员。为了研究At2g23470基因的功能,需要获得At2g23470功能缺失的突变体材料。根据拟南芥信息资源网站(The Arabidopsis Information Resource,TAIR)上公布的At2g23470基因可利用的T-DNA标签品系,从美国拟南芥生物资源中心(Arabidopsis Biological Resource Center,ABRC)购买了2套独立的At2g23470基因的T-DNA插入GABI-Kat株系种子,运用PCR法对这些T-DNA插入突变体进行了基因型分析和鉴定,结果获得了3个纯合的T-DNA插入位于RUS4启动子上的株系和1个T-DNA插入位于第2外显子的株系。RT-PCR分析表明,T-DNA插入位于第2外显子的株系中,At2g23470基因的表达完全缺失。该突变材料的获得为深入研究At2g23470基因的功能奠定了良好的基础。展开更多
文摘为量化评价新能源汽车动力电池回收利用过程的环境效益,为报废动力电池管理体系和回收再利用相关标准的完善提供支撑,助力国家“双碳”目标的实现,以三元锂电池为研究对象,选取典型的动力电池回收利用场景,将三元锂电池的生命周期划分为4个阶段:原材料获取、制造装配、使用和报废回收,并建立相应的GaBi模型,基于湿法回收A、湿法回收B、火法-湿法联合回收3种不同回收利用方式进行三元锂电池生命周期评价模型搭建与回收再利用过程减碳成效测算。研究结果表明,三元锂电池回收再利用过程有较好的减碳成效,基于3种不同回收工艺的三元锂电池回收再利用可以减少CO_(2)排放量分别为:湿法回收A为60.71kgCO_(2)/kWh;湿法回收B为150.00kgCO_(2)/kWh;火法-湿法联合回收为153.57 kg CO_(2)/kWh。基于这3种不同回收工艺的CO_(2)减排效果从优至劣依次为:湿法-火法联合回收、湿法回收B和湿法回收A。合理的动力电池回收利用方式可以显著减少其回收利用过程中的碳排放量,从而产生更好的环境效益。
文摘Quantum spin Hall （QSH） insulators with a large topologically nontrivial bulk gap are crucial for future applications of the QSH effect. Among these, group III-V monolayers and their halides, which have a chair structure （regular hexagonal framework）, have been widely studied. Using first-principles calculations, we formulate a new structure model for the functionalized group III-V monolayers, which consist of rectangular GaBi-X2 （X = I, Br, C1） monolayers with a distorted hexagonal framework （DHF）. These structures have a far lower energy than the GaBi-X2 monolayers with a chair structure. Remarkably, the DHF GaBi-X2 monolayers are all QSH insulators, which exhibit sizeable nontrivial band gaps ranging from 0.17 to 0.39 eV. The band gaps can be widely tuned by applying different spin-orbit coupling strengths, resulting in a distorted Dirac cone.
