Interfacial engineering of Bi2Te3/Sb2Te3 heterojunction enables high-energy cathode for aluminum batteries

被引：68

作者：

Du, Yiqun ^{[1
]}

Zhang, Boya ^{[2
]}

Zhang, Wenyang ^{[1
]}

Jin, Huixin ^{[1
]}

Qin, Jingyu ^{[1
]}

Wan, Jiaqi ^{[2
]}

Zhang, Jianxin ^{[1
]}

Chen, Guowen ^{[1
]}

机构：

[1] Shandong Univ, Sch Mat Sci & Engn, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Jinan 250061, Peoples R China

[2] Qingdao Univ Sci & Technol, Sch Mat Sci & Engn, Qingdao 266042, Peoples R China

来源：

ENERGY STORAGE MATERIALS | 2021年 / 38卷

关键词：

Bismuth telluride; Antimony telluride; Heterojunction; Cathode materials; Aluminum batteries; AL3+ STORAGE MECHANISM; PERFORMANCE; INTERCALATION; COMPOSITES; MXENE;

D O I：

10.1016/j.ensm.2021.03.012

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Rechargeable aluminum batteries (RABs) have been regarded as a low-cost and safe candidate for electrochemical energy storage. However, the high charge density of Al3+ causes its sluggish diffusion and the large size of AlCl4- renders the capacity of the cathode low. Here we propose heterostructured Bi2Te3/Sb(2)T(e)3 nanoflakes by interfacial engineering, constructing a heterojunction that induces a built-in electric field among the interface between two phases to realize rapid charge transfer, fast ion diffusion, and high capacity of cathode. Note that the operational mechanisms of heterostructured Bi2Te3/Sb2Te3 cathode are based on the reversible intercalation/deintercalation of Al3+ ions with the redox process between Bi3+ and Bi5+ upon discharge and charge. As expected, the heterostructured Bi2Te3/Sb2Te3 nanoflakes deliver superb Al-storage property and rate capability, which is among the best comprehensive performances of cathodes in RABs.

引用

页码：231 / 240

页数：10

共 70 条

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