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In Situ Formation of Hierarchical Bismuth Nanodots/Graphene Nanoarchitectures for Ultrahigh-Rate and Durable Potassium-Ion Storage
Zhao, YX; Ren, XC; Xing, ZJ; Zhu, DM; Tian, WF; Guan, CR; Yang, Y; Qin, WM; Wang, J; Zhang, LL; Huang, YB; Wen, W; Li, XL; Tai, RZ
2019
Source PublicationSMALL
ISSN1613-6810
Volume16Issue:2Pages:-
Subtype期刊论文
AbstractMetallic bismuth (Bi) has been widely explored as remarkable anode material in alkali-ion batteries due to its high gravimetric/volumetric capacity. However, the huge volume expansion up to approximate to 406% from Bi to full potassiation phase K3Bi, inducing the slow kinetics and poor cycling stability, hinders its implementation in potassium-ion batteries (PIBs). Here, facile strategy is developed to synthesize hierarchical bismuth nanodots/graphene (BiND/G) composites with ultrahigh-rate and durable potassium ion storage derived from an in situ spontaneous reduction of sodium bismuthate/graphene composites. The in situ formed ultrafine BiND (approximate to 3 nm) confined in graphene layers can not only effectively accommodate the volume change during the alloying/dealloying process but can also provide high-speed channels for ionic transport to the highly active BiND. The BiND/G electrode provides a superior rate capability of 200 mA h g(-1) at 10 A g(-1) and an impressive reversible capacity of 213 mA h g(-1) at 5 A g(-1) after 500 cycles with almost no capacity decay. An operando synchrotron radiation-based X-ray diffraction reveals distinctively sharp multiphase transitions, suggesting its underlying operation mechanisms and superiority in potassium ion storage application.
KeywordANODE MATERIAL COMPOSITE ANODES CAPACITY NANOPARTICLES BATTERIES GRAPHITE GRAPHENE INTERCALATION CARBON RAMAN
DOI10.1002/smll.201905789
Indexed BySCI
Language英语
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/32089
Collection中科院上海应用物理研究所2011-2020年
Affiliation1.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China;
2.Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China;
3.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China;
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China;
5.Henan Univ Technol, Coll Sci, Zhengzhou 450001, Henan, Peoples R China
Recommended Citation
GB/T 7714
Zhao, YX,Ren, XC,Xing, ZJ,et al. In Situ Formation of Hierarchical Bismuth Nanodots/Graphene Nanoarchitectures for Ultrahigh-Rate and Durable Potassium-Ion Storage[J]. SMALL,2019,16(2):-.
APA Zhao, YX.,Ren, XC.,Xing, ZJ.,Zhu, DM.,Tian, WF.,...&Tai, RZ.(2019).In Situ Formation of Hierarchical Bismuth Nanodots/Graphene Nanoarchitectures for Ultrahigh-Rate and Durable Potassium-Ion Storage.SMALL,16(2),-.
MLA Zhao, YX,et al."In Situ Formation of Hierarchical Bismuth Nanodots/Graphene Nanoarchitectures for Ultrahigh-Rate and Durable Potassium-Ion Storage".SMALL 16.2(2019):-.
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