High-performance carbon by amorphization and prepotassiation for potassium-ion battery anodes

Nam, Ki‐Hun; Ganesan, Vinoth; Chae, Keun Hwa; Park, Cheol‐Min

doi:10.1016/j.carbon.2021.05.041

Cited by 19 publications

(9 citation statements)

References 61 publications

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“…The relatively high ICE of TDSC anode as compared to that of HC anode could be attributed to its micro-sized bulk structure with low surface area, thereby reducing the electrolyte decomposition electrode surface. Similar to LIBs, the ICE could be further improved by the optimization of electrolyte, [50,51] prepotassiation [52] or surface modification. [33] A further examination on the charge/discharge profiles reveals that a large part of the reversible capacity of HC comes from the high voltage region (>1 V), whereas TDSC and SC anodes show little capacity above 1 V. Considering the fact that a low working voltage for an anode material is naturally desired in order to realize high energy density, TDSC demonstrates more appealing potential than HC.…”

Section: Resultsmentioning

confidence: 99%

Pseudocapacitive Potassium‐Ion Intercalation Enabled by Topologically Defective Soft Carbon toward High‐Rate, Large‐Areal‐Capacity, and Low‐Temperature Potassium‐Ion Batteries

Yang

Huang

Liu

et al. 2023

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Carbonaceous materials are widely investigated as anodes for potassium‐ion batteries (PIBs). However, the inferior rate capability, low areal capacity, and limited working temperature caused by sluggish K‐ions diffusion kinetics are still primary challenges for carbon‐based anodes. Herein, a simple temperature‐programmed co‐pyrolysis strategy is proposed for the efficient synthesis of topologically defective soft carbon (TDSC) based on inexpensive pitch and melamine. The skeletons of TDSC are optimized with shortened graphite‐like microcrystals, enlarged interlayer spacing, and abundant topological defects (e.g., pentagons, heptagons, and octagons), which endow TDSC with fast pseudocapacitive K‐ion intercalation behavior. Meanwhile, micrometer‐sized structure can reduce the electrolyte degradation over particle surface and avoid unnecessary voids, ensuring a high initial Coulombic efficiency as well as high energy density. These synergistic structural advantages contribute to excellent rate capability (116 mA h g−1 at 20 C), impressive areal capacity (1.83 mA h cm−2 with a mass loading of 8.32 mg cm−2), long‐term cycling stability (capacity retention of 91.8% after 1200 h cycling), and low working temperature (−10 °C) of TDSC anodes, demonstrating great potential for the practical application of PIBs.

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Section: Resultsmentioning

confidence: 99%

Pseudocapacitive Potassium‐Ion Intercalation Enabled by Topologically Defective Soft Carbon toward High‐Rate, Large‐Areal‐Capacity, and Low‐Temperature Potassium‐Ion Batteries

Yang

Huang

Liu

et al. 2023

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“…The exploration of various anode materials that can be readily coupled with high-voltage/high energy density cathode materials for KIBs has yielded significant advancements. 51,306–334 Fig. 25a shows exemplars of anode materials reported for KIBs.…”

Section: High-energy-density Potassium-ion Battery Full Cell Designmentioning

confidence: 99%

Advancements in cathode materials for potassium-ion batteries: current landscape, obstacles, and prospects

Masese,

Kanyolo

2024

Energy Adv.

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“…As shown in Figure 13c, the peak A and peaks of potassium L 3,2 -edge can be distinguished for the prepotassiated/a-CB sample before electrochemical cycling, and the peak intensity of main absorption energy (𝜎 * ) of CB obviously decreased, which both illustrate the a-CB has a good prepotassiation. [223] The effects of pre-sodiation on Mn, Ni, Fe and Cu have been studied by soft XAS in TEY mode. [215] There are some relevant reports on the research of the SEI layer using this technology.…”

Section: Xps and Xasmentioning

confidence: 99%

Critical Review of Emerging Pre‐metallization Technologies for Rechargeable Metal‐Ion Batteries

Li,

Wang,

Wang

et al. 2023

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Low Coulombic efficiency, low‐capacity retention, and short cycle life are the primary challenges faced by various metal‐ion batteries due to the loss of corresponding active metal. Practically, these issues can be significantly ameliorated by compensating for the loss of active metals using pre‐metallization techniques. Herein, the state‐of‐the‐art development in various pr‐emetallization techniques is summarized. First, the origin of pre‐metallization is elaborated and the Coulombic efficiency of different battery materials is compared. Second, different pre‐metallization strategies, including direct physical contact, chemical strategies, electrochemical method, overmetallized approach, and the use of electrode additives are summarized. Third, the impact of pre‐metallization on batteries, along with its role in improving Coulombic efficiency is discussed. Fourth, the various characterization techniques required for mechanistic studies in this field are outlined, from laboratory‐level experiments to large scientific device. Finally, the current challenges and future opportunities of pre‐metallization technology in improving Coulombic efficiency and cycle stability for various metal‐ion batteries are discussed. In particular, the positive influence of pre‐metallization reagents is emphasized in the anode‐free battery systems. It is envisioned that this review will inspire the development of high‐performance energy storage systems via the effective pre‐metallization technologies.

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High-performance carbon by amorphization and prepotassiation for potassium-ion battery anodes

Cited by 19 publications

References 61 publications

Pseudocapacitive Potassium‐Ion Intercalation Enabled by Topologically Defective Soft Carbon toward High‐Rate, Large‐Areal‐Capacity, and Low‐Temperature Potassium‐Ion Batteries

Pseudocapacitive Potassium‐Ion Intercalation Enabled by Topologically Defective Soft Carbon toward High‐Rate, Large‐Areal‐Capacity, and Low‐Temperature Potassium‐Ion Batteries

Advancements in cathode materials for potassium-ion batteries: current landscape, obstacles, and prospects

Critical Review of Emerging Pre‐metallization Technologies for Rechargeable Metal‐Ion Batteries

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