Extremely stable antimony–carbon composite anodes for potassium-ion batteries

Zheng, Jing; Yang, Yong; Fan, Xiulin; Ji, Guangbin; Ji, Xiao; Wang, Haiyang; Hou, Singyuk; Zachariah, Michael R.; Wang, Chunsheng

doi:10.1039/c8ee02836b

Cited by 386 publications

(335 citation statements)

References 38 publications

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“…On the other hand, various alloying and intercalating anodes have attracted widespread attention. [16][17][18] Graphite is the standard Li-intercalating anode, which can be fully lithiated to a stage I LiC 6 graphite intercalation compound giving a capacity of 372 mAh g À1 . However, when used as the anode of SIB, in carbonate electrolyte, graphite can be only sodiated into a stage VIII NaC 64 compound.…”

Section: Introductionmentioning

confidence: 99%

A Site‐Selective Doping Strategy of Carbon Anodes with Remarkable K‐Ion Storage Capacity

et al. 2020

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The limited potassium‐ion intercalation capacity of graphite hampers development of potassium‐ion batteries (PIB). Edge‐nitrogen doping is an effective approach to enhance K‐ion storage in carbonaceous materials. One shortcoming is the lack of precise control over producing the edge‐nitrogen configuration. Here, a molecular‐scale copolymer pyrolysis strategy is used to precisely control edge‐nitrogen doping in carbonaceous materials. This process results in defect‐rich, edge‐nitrogen doped carbons (ENDC) with a high nitrogen‐doping level (up to 10.5 at %) and a high edge‐nitrogen ratio (87.6 %). The optimized ENDC exhibits a high reversible capacity of 423 mAh g−1, a high initial Coulombic efficiency of 65 %, superior rate capability, and long cycle life (93.8 % retention after three months). This strategy can be extended to design other edge‐heteroatom‐rich carbons through pyrolysis of copolymers for efficient storage of various mobile ions.

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Section: Introductionmentioning

confidence: 99%

A Site‐Selective Doping Strategy of Carbon Anodes with Remarkable K‐Ion Storage Capacity

et al. 2020

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“…The galvanostatic charge and discharge behavior of Sb 7 @G 3 at current density of 100 mA g −1 is shown in Figure a. We can see that two discharge voltage platforms at around 0.60 and 0.25 V, corresponding to Sb → KSb → K 3 Sb during the potassiation process; and two charge platforms situated at around 0.70 and 1.0 V, corresponding to K 3 Sb → KSb → Sb during the depotassiation process …”

mentioning

confidence: 98%

“…However, the cycle stability of Sb is usually below 50 cycles due to the large volume expansion and structural failure unless high content of carbon was used as buffer layer . Meanwhile, the high content of carbon will result in a large polarization phenomenon and reduced capacity, and the preparation process is usually complicated, which might result in expensive production cost . Therefore, it is best to prepare antimony‐based electrode with commercialized raw materials via facile methods.…”

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confidence: 99%

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

et al. 2019

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Antimony‐based electrodes have great application prospects for high‐power potassium‐ion batteries (PIBs) due to their low platform and high capacity, while suffering from limited cycle stability and severe pulverization phenomenon. Herein, commercial graphite and antimony powder are utilized to prepare antimony–graphite composites via ball‐milling along with ultrasonic processing. As a result, the antimony‐cluster can embed into the graphite layer and form antimony interspersed graphite composites, which is beneficial to accommodate the volume expansion and degeneration phenomenon of antimony. Consequently, the antimony–graphite composite can deliver high‐reversible capacity (524 mA h g−1 at 50 mA g−1), superior capacity retention (96.8% after 100 cycles), and an excellent rate performance (340 mA h g−1 at 1000 mA g−1). This work paves the way to design high‐performance alloy‐type anode materials for PIBs.

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“…Highly concentrated electrolytes (HCEs) have recently been in the spotlight due to their high redox stability and low firecatching properties, as well as excellent compatibility with Al current collectors, Li-metal anodes, and carbon anodes. [113][114][115][116][117][118][119][120] However, the certain concentration threshold for these merits to appear in HCEs is dependent on the type of solvent, i. e. 4.2 M for acetonitrile (AN) and 22 m for aqueous. It is difficult to presume the appropriate concentration for an HCE when a new solvent system is adopted.…”

Section: Highly Concentrated Electrolytesmentioning

confidence: 99%

Electrolytes for Dual‐Carbon Batteries

Jiang

Luo

Zhong³

et al. 2019

ChemElectroChem

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Dual‐carbon batteries (DCBs) are a promising candidate for smart grid applications, owing to their low cost, high power capability, and environmentally friendly benefits. As an essential component of DCBs, electrolytes not only act as a medium for ion migration during the running of the battery, but also provide active ions to be intercalated into carbon electrodes, exerting significant impacts on the electrochemical performance and safety of the DCB. In this Review, we discuss recent progress in electrolyte research for DCBs, including conventional liquid electrolytes, highly concentrated electrolytes, and gel polymer electrolytes, with a focus on their stability and compatibility with carbon electrodes. Finally, we present perspectives on the current limitations and future research directions of electrolytes for DCBs. Some recommendations for battery evaluation are also offered.

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Extremely stable antimony–carbon composite anodes for potassium-ion batteries

Cited by 386 publications

References 38 publications

A Site‐Selective Doping Strategy of Carbon Anodes with Remarkable K‐Ion Storage Capacity

A Site‐Selective Doping Strategy of Carbon Anodes with Remarkable K‐Ion Storage Capacity

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

Electrolytes for Dual‐Carbon Batteries

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