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Nanoconfined NaAlH4 Conversion Electrodes for Li Batteries
ACS Omega ( IF 3.7 ) Pub Date : 2017-05-10 00:00:00 , DOI: 10.1021/acsomega.7b00143 Priscilla Huen 1 , Filippo Peru 2 , Georgia Charalambopoulou 2 , Theodore A Steriotis 2 , Torben R Jensen 1 , Dorthe B Ravnsbæk 3
ACS Omega ( IF 3.7 ) Pub Date : 2017-05-10 00:00:00 , DOI: 10.1021/acsomega.7b00143 Priscilla Huen 1 , Filippo Peru 2 , Georgia Charalambopoulou 2 , Theodore A Steriotis 2 , Torben R Jensen 1 , Dorthe B Ravnsbæk 3
Affiliation
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In the past, sodium alanate, NaAlH4, has been widely investigated for its capability to store hydrogen, and its potential for improving storage properties through nanoconfinement in carbon scaffolds has been extensively studied. NaAlH4 has recently been considered for Li-ion storage as a conversion-type anode in Li-ion batteries. Here, NaAlH4 nanoconfined in carbon scaffolds as an anode material for Li-ion batteries is reported for the first time. Nanoconfined NaAlH4 was prepared by melt infiltration into mesoporous carbon scaffolds. In the first cycle, the electrochemical reversibility of nanoconfined NaAlH4 was improved from around 30 to 70% compared to that of nonconfined NaAlH4. Cyclic voltammetry revealed that nanoconfinement alters the conversion pathway, and operando powder X-ray diffraction showed that the conversion from NaAlH4 into Na3AlH6 is favored over the formation of LiNa2AlH6. The electrochemical reactivity of the carbon scaffolds has also been investigated to study their contribution to the overall capacity of the electrodes.
中文翻译：
用于锂电池的纳米限制 NaAlH4 转换电极
过去，铝氢化钠（NaAlH 4）因其储存氢的能力而被广泛研究，并且其通过碳支架中的纳米限制改善储存性能的潜力也被广泛研究。NaAlH 4最近被考虑作为锂离子电池中的转换型阳极用于锂离子存储。在此，首次报道了纳米限制在碳支架中的NaAlH 4作为锂离子电池负极材料。纳米限制的NaAlH 4通过熔体渗透到介孔碳支架中制备。在第一次循环中，纳米限制NaAlH 4的电化学可逆性与非限制NaAlH 4相比从约30%提高到70% 。循环伏安法显示纳米限制改变了转化途径，操作粉末X射线衍射显示从NaAlH 4到Na 3 AlH 6的转化比LiNa 2 AlH 6的形成更有利。还研究了碳支架的电化学反应性，以研究它们对电极整体容量的贡献。
更新日期：2017-05-10
中文翻译：
用于锂电池的纳米限制 NaAlH4 转换电极
过去，铝氢化钠（NaAlH 4）因其储存氢的能力而被广泛研究，并且其通过碳支架中的纳米限制改善储存性能的潜力也被广泛研究。NaAlH 4最近被考虑作为锂离子电池中的转换型阳极用于锂离子存储。在此，首次报道了纳米限制在碳支架中的NaAlH 4作为锂离子电池负极材料。纳米限制的NaAlH 4通过熔体渗透到介孔碳支架中制备。在第一次循环中，纳米限制NaAlH 4的电化学可逆性与非限制NaAlH 4相比从约30%提高到70% 。循环伏安法显示纳米限制改变了转化途径，操作粉末X射线衍射显示从NaAlH 4到Na 3 AlH 6的转化比LiNa 2 AlH 6的形成更有利。还研究了碳支架的电化学反应性，以研究它们对电极整体容量的贡献。
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