Binder less-integrated freestanding carbon film derived from pitch as light weight and high-power anode for sodium-ion battery

Ghosh, Sourav; Kumar, Vipin; Kumar, Sachin; Sunkari, U.; Biswas, Sushanta; Martha, Surendra K.

doi:10.1016/j.electacta.2020.136566

Cited by 24 publications

(21 citation statements)

References 62 publications

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“…[22][23][24] Carbon derived from P-pitch at 700 °C is nongraphitic and forms a porous network that leads to better active material utilization at the time of bulk mass loading (15-20 mg cm −2 ) and offers better wettability when in contact with liquid electrolyte. [25][26][27] The carbonized P-pitch plays the role of a conducting binder to establish a strong connection between the active material and current collector with far less weight (5 wt%) than conventional 10-20 wt% of PVDF and C-black used in commercial cells. Pitch also forms a second carbon coating layer on the active material as the active material LiFePO 4 is already coated with carbon.…”

Section: Morphology and Structure Of P-cfsmentioning

confidence: 99%

Multifunctional Utilization of Pitch‐Coated Carbon Fibers in Lithium‐Based Rechargeable Batteries

Ghosh

Bhattacharjee

Sivaraman

et al. 2021

Advanced Energy Materials

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This work reports carbon fibers as an electrode material and current collector for dual‐carbon and lithium‐ion batteries. Fully graphitic and semigraphitic carbon fibers undergo anion intercalation beyond 4.5 V versus Li/Li+. Symmetric dual‐carbon full cells using a pitch‐coated fully graphitic carbon fiber mat as both cathode and anode delivers an energy‐density of 276 and 322 Wh kg−1 at 342 W kg−1 power density in the voltage range of 3.0–5.0 and 3.0–5.2 V, respectively. On the other hand, nongraphitic carbon fibers do not exhibit anion intercalation up to 5.2 V and can be used as a current collector. They also possess a larger number of Li+ storage sites in their randomly oriented microstructure when used as an anode. A lithium‐ion full cell with double carbon‐coated C‐LiFePO4 loaded on nongraphitic carbon fiber as a cathode and pitch‐coated nongraphitic carbon fiber as an anode exhibits 202.6 and 75.2 Wh kg−1 energy density at power densities of 46.75 W kg−1 and 11.7 kW kg−1, respectively in 2.0–3.5 V range. This pitch‐coated carbon fiber‐based battery configuration eliminates the need for metal foils and costly fluorinated binders, lowers overall weight of the cell, and is capable of sustaining mechanical stress and thermal shock.

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Section: Morphology and Structure Of P-cfsmentioning

confidence: 99%

Multifunctional Utilization of Pitch‐Coated Carbon Fibers in Lithium‐Based Rechargeable Batteries

Ghosh

Bhattacharjee

Sivaraman

et al. 2021

Advanced Energy Materials

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“…Finally, the obtained powders were named NVPF (pristine material), 10-SC@NVPF, 15-SC@NVPF, and 20-SC@NVPF according to the amount of pitch used for the synthesis. It is to be noted that soft carbon derived from P-pitch at 700 °C forms porous carbons with reasonable conductivity, which is beneficial for NVPF cathodes for the improved electrochemical performance of SIBs. , Besides, pitch-derived soft carbons at 700 °C (rather than high temperatures) were found to be a potential low-cost precursor to synthesize soft carbon anodes for SIBs …”

Section: Methodsmentioning

confidence: 99%

“…Petroleum-pitch-derived soft-carbon (SC)-based semigraphitic structures with lesser defects and a short-range order can act as superior coating layers onto the electrode materials for improving conductivity. , In recent years, pitch-derived soft carbons have been exploited as anodes for energy storage due to the kinetically favorable transportation of the ion and electron . Further, hard carbon-coated active material composites have also been proved to enhance the storage performance of lithium- and sodium-ion batteries effectively. , Based on this approach, pitch-derived soft-carbon-wrapped NaVPO 4 F cathode materials are synthesized to improve the electrochemical performance of NaVPO 4 F. This work presents a simple synthetic reflux approach to synthesize NaVPO 4 F with an effective carbon content using petroleum pitch (P-pitch) as the source of soft carbon.…”

Section: Introductionmentioning

confidence: 99%

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Pitch-Derived Soft-Carbon-Wrapped NaVPO₄F Composite as a Potential Cathode Material for Sodium-Ion Batteries

Kumar

Ghosh

Biswas

et al. 2021

ACS Appl. Energy Mater.

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Sodium vanadium fluorophosphate (NaVPO4F) is a potential electrode material for sodium-ion batteries due to its stable structural framework with a reasonable theoretical capacity of 143 mAh g–1. However, its poor electronic conductivity limits its C-rate performance and cycle stability. To solve the problem associated with poor electronic conductivity, in this work, pitch-derived soft-carbon-wrapped NaVPO4F particles with an interconnected carbon matrix is proposed. Transmission electron microscopy (TEM) and Raman studies suggest that the interlayer spacing of the soft carbon layer is around 0.47 nm, which facilitates faster kinetics upon cycling. The presence of 15% soft carbon in the composite samples results in higher Na-ion diffusion coefficient values, stable cycling, and C-rate performances. The composite cathode delivers an initial reversible capacity of 109 mAh g–1 with 95% capacity retention at 0.1C for 300 cycles. Besides, 77% capacity retention is observed after 1000 cycles at a 0.5C rate. Such a remarkable electrochemical performance is attributed to the appropriate amount of soft carbon wrapped onto NaVPO4F and the interconnected carbon matrix, which provides continuous electronic conduction, improved structural integrity, and faster kinetics of NaVPO4F particles. Finally, practical sodium-ion full cells using the NaVPO4F composite cathode and the pretreated hard carbon anode are realized. The cells show an operating voltage of 3.3 V with a capacity retention of ∼87% at the end of the 50th cycle at 30 mA g–1. This suggests that the NaVPO4F-based composite electrode materials are robust cathodes and can be potentially implemented in sodium-ion batteries.

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“…PAN has been used as a precursor owing to its high melting temperature and high carbon yield in the range of 50-60% [11]. Pitch has emerged as a soft carbon precursor owing to its inherent aromatic molecular structure [12]. Rayon is another attractive precursor owing to its low cost [13].…”

Section: Introductionmentioning

confidence: 99%

Designing Materials and Processes for Strong Polyacrylonitrile Precursor Fibers

2021

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Although polyacrylonitrile (PAN)-based carbon fibers have been successfully commercialized owing to their excellent material properties, their actual mechanical performance is still much lower than the theoretical values. Meanwhile, there is a growing demand for the use of superior carbon fibers. As such, many studies have been conducted to improve the mechanical performance of carbon fibers. Among the various approaches, designing a strong precursor fiber with a well-developed microstructure and morphology can constitute the most effective strategy to achieve superior performance. In this review, the efforts used to modulate materials, processing, and additives to deliver strong precursor fibers were thoroughly investigated. Our work demonstrates that the design of materials and processes is a fruitful pathway for the enhancement of the mechanical performance of carbon fibers.

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Binder less-integrated freestanding carbon film derived from pitch as light weight and high-power anode for sodium-ion battery

Cited by 24 publications

References 62 publications

Multifunctional Utilization of Pitch‐Coated Carbon Fibers in Lithium‐Based Rechargeable Batteries

Multifunctional Utilization of Pitch‐Coated Carbon Fibers in Lithium‐Based Rechargeable Batteries

Pitch-Derived Soft-Carbon-Wrapped NaVPO₄F Composite as a Potential Cathode Material for Sodium-Ion Batteries

Designing Materials and Processes for Strong Polyacrylonitrile Precursor Fibers

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Binder less-integrated freestanding carbon film derived from pitch as light weight and high-power anode for sodium-ion battery

Cited by 24 publications

References 62 publications

Multifunctional Utilization of Pitch‐Coated Carbon Fibers in Lithium‐Based Rechargeable Batteries

Multifunctional Utilization of Pitch‐Coated Carbon Fibers in Lithium‐Based Rechargeable Batteries

Pitch-Derived Soft-Carbon-Wrapped NaVPO4F Composite as a Potential Cathode Material for Sodium-Ion Batteries

Designing Materials and Processes for Strong Polyacrylonitrile Precursor Fibers

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Pitch-Derived Soft-Carbon-Wrapped NaVPO₄F Composite as a Potential Cathode Material for Sodium-Ion Batteries