Micron-Sized Nanoporous Antimony with Tunable Porosity for High-Performance Potassium-Ion Batteries

被引：252
作者：
An, Yongling [1 ,2 ]
Tian, Yuan [1 ,2 ]
Ci, Lijie [1 ,2 ]
Xiong, Shenglin [3 ]
Feng, Jinkui [1 ,2 ]
Qian, Yitai [4 ]
机构：
[1] Shandong Univ, SDU, Jinan 250061, Shandong, Peoples R China
[2] Shandong Univ, Sch Mat Sci & Engn, Key Lab Liquid Solid Struct Evolut & Proc Mat, Rice Joint Ctr Carbon Nanomat,Minist Educ, Jinan 250061, Shandong, Peoples R China
[3] Shandong Univ, Sch Chem & Chem Engn, Jinan 250100, Peoples R China
[4] Univ Sci & Technol China, Dept Chem, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China
来源：
ACS NANO | 2018年 / 12卷 / 12期
基金：
中国国家自然科学基金;
关键词：
potassium-ion batteries; nanoporous antimony; micron-sized; tunable porosity; vacuum distillation; anode; LONG CYCLE LIFE; ANODE MATERIAL; HIGH-CAPACITY; LITHIUM-ION; K-ION; POROUS CARBON; ORGANIC ANODES; ENERGY-STORAGE; OXYGEN BATTERY; DOPED GRAPHENE;
D O I：
10.1021/acsnano.8b08740
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Potassium-ion batteries (KIBs) are considered favorable candidates for post-lithium-ion batteries, a quality attributed to their low cost, abundance as a resource, and high working potential (-2.93 V for K+/K). Owning to its relatively low potassiation potential and high theoretical capacity, antimony (Sb) is one of the most favorable anodes for KIBs. However, the large volume changes during K-Sb alloying and dealloying causes fast capacity degradation. In this report, nanoporous Sb (NP-Sb) is fabricated by an environmentally friendly vacuum-distillation method. The NP-Sb is formed via evaporating low-boiling-point zinc (Zn). The byproduct Zn can be recycled. It is further found that the morphology and porosity can be controlled by adjusting Zn-Sb composition and distillation temperature. The nanoporous structure can accommodate volume expansion and accelerate ion transport. The NP-Sb anode delivers an improved electrochemical performance. These results suggest that the vacuum-distillation method may provide a direction for the green, large-scale, and tunable fabrication of nanoporous materials.
引用
收藏
页码：12932 / 12940
页数：9
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