Antimony–Graphite Composites for a High‐Performance Potassium‐Ion Battery

Liu, Qian; Fan, Ling; Chen, Suhua; Su, Sailan; Ma, Ruifang; Han, Xu; Lu, Bingan

doi:10.1002/ente.201900634

Cited by 32 publications

(13 citation statements)

References 49 publications

(81 reference statements)

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“…Therefore, the resultant capacity fading and poor rate performance have become a huge challenge for alloying-type electrode materials. To address these issues, various methods have been utilized, such as nanostructure engineering, [9,10] carbon coating, [11,12] and doping. [13,14] Recently, binary or ternary alloy was believed to possess a robust capability in effectively alleviating violent volume strain, accelerating the electrochemical kinetics and providing abundant active sites.…”

Section: Introductionmentioning

confidence: 99%

Alloyed BiSb Nanoparticles Confined in Tremella‐Like Carbon Microspheres for Ultralong‐Life Potassium Ion Batteries

Huang

et al. 2021

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Bismuth-antimony alloy is considered as a promising potassium ion battery anode because of its combination of the high theoretical capacity of antimony and the excellent rate capacity of bismuth. However, the large volume change and sluggish reaction kinetic upon cycling have triggered severe capacity fading and poor rate performance. Herein, a nanoconfined BiSb in tremellalike carbon microspheres (BiSb@TCS) are delicately designed to address these issues. As-prepared BiSb@TCS renders an outstanding potassiumstorage performance with a reversible capacity of 181 mAh g −1 after ultralong 5700 cycles at a current density of 2 A g −1 , and an excellent rate capacity of 119.3 mAh g −1 at 6 A g −1 . Such a superior performance can be ascribed to the delicate microstructure. The self-assembled carbon microspheres can strengthen integral structure and effectively accommodate the volume expansion of BiSb nanoparticles, and 2D carbon nanowalls in carbon microspheres can provide fast ion/electron diffusion dynamic. Theoretical calculation also suggests a thermodynamic feasibility of alloyed BiSb nanoparticles for storing potassium ion. Such a work shows that BiSb@TCS possesses a great potential to be a high-performance anode of potassium ion batteries. The rational designing of multiscaled structure would be instructive to the exploitation of other energy-storage materials.

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Section: Introductionmentioning

confidence: 99%

Alloyed BiSb Nanoparticles Confined in Tremella‐Like Carbon Microspheres for Ultralong‐Life Potassium Ion Batteries

Huang

et al. 2021

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“…[ 6–10 ] The standard electrode potentials (vs SHE) of Na + and K + are −2.71 and −2.93 V, respectively which are close to the standard electrode potential of Li + of −3.04 V, suggesting that the NIBs and PIBs could exhibit a comparable discharge voltage and energy density as the LIBs. [ 9–29 ]…”

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confidence: 99%

Artificial SEI for Superhigh‐Performance K‐Graphite Anode

et al. 2021

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Although graphite with its merits of low cost, abundance, and environmental friendliness is a potential anode material for potassium ion batteries (PIBs), it suffers from a limited cycle life due to a severe decomposition of the solid electrolyte interface (SEI) in organic electrolytes. Herein, a simple and viable method is demonstrated for the first time through which an ultra‐thin, uniform, dense, and stable artificial inorganic SEI film can be prepared on commercial graphite anodes and used with traditional carbonate electrolytes to achieve PIBs with long‐cycle stability and high initial Coulombic efficiency (ICE). Specifically, such commercial graphite anodes exhibit a long‐term cycling stability for more than 1000 cycles at 100 mA g−1 (a reversible capacity of around 260 mAh g−1) and a high average CE (around 99.9%) in traditional carbonate electrolytes with no discernable decay in capacity. More importantly, the commercial graphite anodes with the artificial inorganic SEI film in traditional carbonate electrolytes can deliver a high ICE of 93% (the highest ICE ever reported for PIBs anodes until now), which improves the performance of the PIB full cell. Considering the high ICE and long cycle stability performance, this study can promote the rapid deployment of PIBs on a commercial scale.

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“…4e . 83 Considering that the effective utilization of RP as an active material in KIBs had not been well-studied, Tuan et al attempted a one-pot milling approach to prepare activated RP/C-based KIB electrodes composed of RP, multi-wall carbon nanotubes (CNTs), and Ketjen black, wherein the RP NPs were evenly dispersed in a carbon matrix with desirable electrical pathways and strong scaffolds. 95 Notably, there was no P–C bond formed in the composite, which might be beneficial for the effective reaction between K-ions and RP ( Fig.…”

Section: Strategies and Methodsmentioning

confidence: 99%