Structural transformation of porous and disordered carbon during ball-milling

Yuan, Renlu; Dong, Yue; Hou, Ruoyang; Shang, L.; Zhang, Jiapeng; Zhang, Su; Chen, Xiaohong; Song, Huaihe

doi:10.1016/j.cej.2022.140418

Cited by 41 publications

(13 citation statements)

References 63 publications

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“…A notable reduction in BET surface area was observed for Ni–N–C (599.5 m 2 g −1 ) and Co–Ni–N–C (497.4 m 2 g −1 ), possibly due to increased structural defect and disorder. 58 The highly microporous structure provides a large adsorption capacity for reactant molecules and enhanced mass-transport properties. 59 Furthermore, the extensive microporosity inside the catalysts hosts a large number of defect sites in the vicinity of micropores to facilitate reaction activation.…”

Section: Resultsmentioning

confidence: 99%

Highly efficient CO₂ electrochemical reduction on dual metal (Co–Ni)–nitrogen sites

Chen,

Ahasan,

et al. 2024

J. Mater. Chem. A

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Section: Resultsmentioning

confidence: 99%

Highly efficient CO₂ electrochemical reduction on dual metal (Co–Ni)–nitrogen sites

Chen,

Ahasan,

et al. 2024

J. Mater. Chem. A

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“…Currently, improving the energy density of SCs is mainly achieved by adjusting their specific capacitance and working voltage window. In addition to selecting electrode materials with high theoretical capacity, the specific capacitance can also be improved by designing and optimizing the structure and morphology of the electrodes. , Asymmetric supercapacitors (ASCs) assemble pseudocapacitor electrodes and double-layer electrodes into a single device, which can exhibit high energy density with a wide voltage window. Therefore, the design of a hybrid energy storage device with high energy and power densities, as well as good cycling stability, has great potential for practical applications. − …”

Section: Introductionmentioning

confidence: 99%

“…In addition to selecting electrode materials with high theoretical capacity, the specific capacitance can also be improved by designing and optimizing the structure and morphology of the electrodes. 7,8 Asymmetric supercapacitors (ASCs) assemble pseudocapacitor electrodes and double-layer electrodes into a single device, which can exhibit high energy density with a wide voltage window.…”

Section: Introductionmentioning

confidence: 99%

Energy Storage Kinetics of Hierarchically Designed Co₉S₈@CoNiO₂ Hollow Cubic Supercapacitors with Improved Stability and Energy Density

Ren,

Chen,

Guan

et al. 2023

J. Phys. Chem. C

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The delicate design and rational preparation of core−shell heterostructures are effective in improving the energy conversion and storage characteristics in supercapacitors. Herein, we designed and constructed cobalt metal−organic framework (Co-MOF) hollow core− shell nanocubes decorated with abundant Co 9 S 8 and CoNiO 2 nanofeatures. The synergistically composed Co 9 S 8 @CoNiO 2 -120 exhibits high electrical conductivity, high cycling stability, and excellent energy density compared to others with different Ni contents. The improvement of structural stability originated from the pseudocapacitive nature of Co 9 S 8 . The conversion of CoNi-LDH to CoNiO 2 increases the cycle stability by 8.7 times (specific capacity retention of 587.3 C g −1 after 10 000 cycles at a high current density of 10 A g −1 ) with the specific capacity (652.6 C g −1 at 1 A g −1 ) 3.4-fold higher than that of Co 9 S 8 . Mechanism analysis reveals that the dissociation process of OH − is more detrimental to the cycle stability. Furthermore, the assembled asymmetric supercapacitor (ASC) device demonstrates a maximum energy density of 50 Wh kg −1 (49.4 Wh kg −1 after consideration of iR loss) at a corresponding power density of 800 W kg −1 (790 W kg −1 after consideration of iR loss), with 82% capacity retention over 5000 cycles at 5 A g −1 . Our work provides a novel approach for MOF derivative supercapacitors in practical energy storage applications.

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“…Yuan et al utilized ball milling to repair defects and introduced oxygen-containing functional groups into activated carbon. The energy storage mechanism transitioned from a double-layer capacitance to a pseudocapacitance, demonstrating significantly improved volumetric capacitance and outstanding rate performance [ 44 ].…”

Section: Introductionmentioning

confidence: 99%

Enhancing Sodium-Ion Energy Storage of Commercial Activated Carbon by Constructing Closed Pores via Ball Milling

Wang,

Fang,

Zheng

et al. 2023

Nanomaterials

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Mechanical ball milling is a prevalent technology for material preparation and also serves as a post-treatment method to modify electrode materials, thus enhancing electrochemical performances. This study explores the microstructure modification of commercial activated carbon through mechanical ball milling, proving its efficacy in increasing sodium-ion energy storage. The evolution of activated carbon’s physical and chemical properties during ball milling was systematically examined. It was observed that the quantity of closed pores and the graphitization degree in activated carbon increased with extended ball milling duration. The sodium storage mechanism in activated carbon transitions to an insertion-pore filling process, significantly elevating platform capacity. Additionally, ball-milled activated carbon demonstrates remarkable long-term cycling stability (92% capacity retention over 200 cycles at 200 mA g−1) and rate performance. This research offers a novel approach to developing advanced anode materials for sodium-ion batteries.

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Structural transformation of porous and disordered carbon during ball-milling

Cited by 41 publications

References 63 publications

Highly efficient CO₂ electrochemical reduction on dual metal (Co–Ni)–nitrogen sites

Highly efficient CO₂ electrochemical reduction on dual metal (Co–Ni)–nitrogen sites

Energy Storage Kinetics of Hierarchically Designed Co₉S₈@CoNiO₂ Hollow Cubic Supercapacitors with Improved Stability and Energy Density

Enhancing Sodium-Ion Energy Storage of Commercial Activated Carbon by Constructing Closed Pores via Ball Milling

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Structural transformation of porous and disordered carbon during ball-milling

Cited by 41 publications

References 63 publications

Highly efficient CO2 electrochemical reduction on dual metal (Co–Ni)–nitrogen sites

Highly efficient CO2 electrochemical reduction on dual metal (Co–Ni)–nitrogen sites

Energy Storage Kinetics of Hierarchically Designed Co9S8@CoNiO2 Hollow Cubic Supercapacitors with Improved Stability and Energy Density

Enhancing Sodium-Ion Energy Storage of Commercial Activated Carbon by Constructing Closed Pores via Ball Milling

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Highly efficient CO₂ electrochemical reduction on dual metal (Co–Ni)–nitrogen sites

Highly efficient CO₂ electrochemical reduction on dual metal (Co–Ni)–nitrogen sites

Energy Storage Kinetics of Hierarchically Designed Co₉S₈@CoNiO₂ Hollow Cubic Supercapacitors with Improved Stability and Energy Density