Bi Nanoparticles Anchored in N-Doped Porous Carbon as Anode of High Energy Density Lithium Ion Battery

Zhong, Yisen; Li, Bin; Li, Shumin; Xu, Shaofa; Pan, Zhenghui; Huang, Qiming; Xing, Lidan; Wang, Chunsheng; Li, Weishan

doi:10.1007/s40820-018-0209-1

Cited by 117 publications

(97 citation statements)

References 73 publications

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“…When metallic Bi is formed again at the end of the 1st depotassiation process, its XRD peaks become slightly broader compared with that of the starting one, indicating that the metallic Bi nanodots do not agglomerate during the electrochemical cycling process due to the unique integrated nanostructure. This is very different from previous studies of Bi‐based anodes in lithium batteries, where fast Bi agglomeration is usually observed and results in poor cycling stability . Actually, all phases that appeared during potassiation/depotassiation (Bi, KBi 2 , K 3 Bi 2 , K 3 Bi) are nanoscale, which always ensures a short K + ionic transportation pathway.…”

Section: Resultscontrasting

confidence: 67%

In Situ Formation of Hierarchical Bismuth Nanodots/Graphene Nanoarchitectures for Ultrahigh‐Rate and Durable Potassium‐Ion Storage

Zhao

Ren

Xing

et al. 2019

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urgent strategies worldwide. [1] Rechargeable lithium-ion batteries have achieved great success during the last 40 years, while they gradually display certain limitations in further large-scale applications, such as high cost, uneven geological distribution and short supplies of lithium resources (0.0017 wt%) around the world. As alternative energy storage sources, sodium ion batteries (SIBs) and potassium ion batteries (PIBs) have recently attracted tremendous interest owing to their natural abundance, low cost and environmental friendliness. Despite having a similar abundance with sodium (sodium and potassium represent 2.36 and 2.09 wt% in the Earth's crust, respectively), potassium presents some specific advantages. K + /K exhibit a lower standard redox potential of −2.93 V (vs E°) compared with that of Na + /Na (−2.71 V vs E°), implying a higher working voltage and energy density of PIBs. [2] Moreover, potassium ions have much better conductivity and relatively lower desolvation energy in organic solvents. [3] These merits of potassium make it a promising low-cost candidate for high-energy and power density energy storage applications.The progress of PIBs mainly follows the development of electrode materials, especially considering the large-size of Metallic 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 ≈406% from Bi to full potassiation phase K 3 Bi, 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 (≈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.

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Section: Resultscontrasting

confidence: 67%

In Situ Formation of Hierarchical Bismuth Nanodots/Graphene Nanoarchitectures for Ultrahigh‐Rate and Durable Potassium‐Ion Storage

Zhao

Ren

Xing

et al. 2019

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“…Lithium-ion batteries (LIBs) are widely utilized in the portable electronics owing to their numerous merits, such as high energy density, long lifespan, and environmental friendliness [1][2][3][4]. Nevertheless, to meet the ever-growing demand for longer distance electric vehicles and more advanced electrical devices, the energy density of commercially available LIBs needs to be further enhanced [5][6][7]. Si anode with the highest theoretical specific capacity (4400 mAh g À1 ) presents the most competitive alternative to graphite among all the lithium storage materials [8,9].…”

Section: Introductionmentioning

confidence: 99%

Thermal pyrolysis of Si@ZIF-67 into Si@N-doped CNTs towards highly stable lithium storage

Jin

Yang

et al. 2020

Science Bulletin

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“…The d ‐spacings of 2.45 and 2.60 Å are indexed to the (101) and (002) planes of ZnO, respectively, [ 30 ] whereas for metallic Zn, a d ‐spacing of 2.11 Å corresponding to the (101) plane is observed. [ 31 ] The distribution of ZnO on the surface of Zn@ZnO HPA was confirmed using energy‐dispersive X‐ray spectroscopy (EDS) (Figure S3, Supporting Information). A comparison of the oxygen components at the top, side, and bottom of Zn@ZnO HPA showed that the oxygen content decreased from the top to the bottom, which indicates that the thickness of the ZnO layer is dependent on the position, with the thickness generally decreasing from the top to the bottom.…”

Section: Resultsmentioning

confidence: 99%

Functionalized Zn@ZnO Hexagonal Pyramid Array for Dendrite‐Free and Ultrastable Zinc Metal Anodes

Kim

Liu

Shim

et al. 2020

Adv Funct Materials

158

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Here, an electrode comprising a Zn hexagonal pyramid array (HPA) coated with a functionalized ZnO layer (Zn@ZnO HPA) is prepared using a periodic anodizing technique. The HPA structure markedly increases the electroactive surface area of Zn anode, thus decreasing the local current density. Furthermore, the functionalized ZnO coating layer has a gradient thickness that plays an important role in the selective deposition of Zn ions and the mitigation of side reactions at the interface. The electrochemical stability of the Zn@ZnO HPA electrode, which is closely related to the electroactive surface area and charge transfer resistance, is determined by the “split” value, i.e., ratio of current‐off to current‐on time, a parameter of the periodic anodizing process. Compared with the pristine Zn‐based symmetric cell, the Zn@ZnO HPA‐based symmetric cell is safely operated in the investigated experimental range with the 10‐fold improved running life and 25‐fold enhanced current density without Zn dendrite growth. Moreover, the Zn@ZnO HPA/MnO2 battery exhibits outstanding long‐term cyclability (nearly 100%) with greater than 99% Coulombic efficiency after 1000 cycles at a current density of 9 A g−1. This periodic anodizing technique for ultrastable Zn metal anodes is expected to contribute to the development of inherently safe energy storage systems.

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Bi Nanoparticles Anchored in N-Doped Porous Carbon as Anode of High Energy Density Lithium Ion Battery

Cited by 117 publications

References 73 publications

In Situ Formation of Hierarchical Bismuth Nanodots/Graphene Nanoarchitectures for Ultrahigh‐Rate and Durable Potassium‐Ion Storage

In Situ Formation of Hierarchical Bismuth Nanodots/Graphene Nanoarchitectures for Ultrahigh‐Rate and Durable Potassium‐Ion Storage

Thermal pyrolysis of Si@ZIF-67 into Si@N-doped CNTs towards highly stable lithium storage

Functionalized Zn@ZnO Hexagonal Pyramid Array for Dendrite‐Free and Ultrastable Zinc Metal Anodes

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