期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 8, 期 1, 页码 335-342出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.9b05474
关键词
laser; Bi-Sb alloys; uniform size; anode of SIBs; cycling performance
资金
- National Natural Science Foundation of China [21471118, 91545205, 91622103]
- National Key Basic Research Program of China [2014CB239203]
We report the design and synthesis of a bismuth metal organic framework (MOF), MOF-836. This MOF is loaded with Sb salts in its pores and is used as the precursor for the production of Bi-Sb alloy nanoparticles by the nanoscale laser metallurgy method in the air. The resulting Bi-Sb alloy nanoparticles, Bi1-xSbx(from MOF-836), exhibit uniform particle sizes of 30 +/- 10 nm, and their compositions are precisely controlled by tuning the content of Sb in MOF-836. These Bi-Sb alloys, along with the ones prepared from another Bi-MOF, CAU-7, were employed as anodes for sodium-ion batteries (SIBs). The nanosized Bi0.70Sb0.30(from MOF-836) alloys showed a specific capacity of 259.8 mAh g(-1) at 200 mA g(-1) after 500 cycles, and excellent cycling performance, capacity retention of 180.9 mAh g(-1) at 1 A g(-1) over 1000 cycles with a capacity loss of only 0.055% per cycle. This nanoscale laser metallurgy method using MOFs as precursors represents a new way to prepare alloy nanoparticles.
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