Regeneration of Fully-discharged Graphite-Fluoride Lithium Primary Battery as Electrochemical Capacitor

Shimabukuro, Izuru; Kawashima, T.; Shiraishi, Yasuyoshi; Katagiri, Noriaki; Hatakeyama, Yutaka; Shiraishi, Soshi

doi:10.5796/electrochemistry.20-65131

Cited by 5 publications

(9 citation statements)

References 31 publications

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“…However, if we suppose that mechanism 1 is the main reaction from the second charge–discharge in this system, the relatively large reversible capacities of about 200 mAh g –1 cannot be explained because BF 4 – anions are barely intercalated into amorphous carbon and show a maximum intercalation capacity of 97.6 mAh g –1 for crystalline graphite . Regarding mechanism 3, Shimabukuro et al reported that the desorption–adsorption reaction of Li + ions occurred within a voltage range of 2–4 V in a GF/Li primary battery system after full discharge . Therefore, we additionally investigated the influence of Li + adsorption and desorption in this system, as shown in Figure S2.…”

Section: Resultsmentioning

confidence: 81%

Rechargeable Graphite Fluoride Electrodes Realized by Fluoride Anion Insertion and Deinsertion

et al. 2022

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This study found for the first time that F– anions can be electrochemically inserted or deinserted into or from carbon-based materials, respectively, using a combination of graphite fluoride (GF) and a Li-based organic electrolyte with a suitably high potential (>5.0 V vs Li+/Li). The GF materials used in this study produced amorphous carbon and LiF after the first discharge, with a discharge capacity of 600 mAh g–1 that was almost in line with the theoretical value (about 630 mAh g–1). As determined by subsequent electrochemical measurements, a reversible charge or discharge capacity of ∼200 mAh g–1 in addition to a Coulombic efficiency of ∼86% and a capacity retention of ∼85% after 30 cycles were observed within a potential range of 1.5–5.3 V. Various analyses clearly demonstrate that the electrochemical properties resulted from the reversible insertion and deinsertion of F– anions into and from amorphous carbon formed in the GF cathode, respectively, which was triggered by the formation of LiF, the source of the F– anions.

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Section: Resultsmentioning

confidence: 81%

Rechargeable Graphite Fluoride Electrodes Realized by Fluoride Anion Insertion and Deinsertion

et al. 2022

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“…The charge-discharge mechanism of the discharged GF electrode was analyzed by the inductively coupled plasma optical emission spectroscopy, ion chromatography, and electrochemical quartz crystal microbalance. 61 As a result, it was revealed that the Li + cation is doped/undoped into the nanocomposite of carbon and LiF. This analytical result and the low microporosity of the electrode suggest the Li + adsorption/ desorption on the surface of the small-sized carbon crystallite with wide interspace by the diffusion between the LiF nano-particles.…”

Section: Non-porous Carbonsmentioning

confidence: 88%

“…Thus, it was revealed that the discharged GF-Li battery can be recharged as a new hybrid electrochemical capacitor. 61 The dischargecharge curves of the GF-Li battery are shown in Fig. 13.…”

Section: Non-porous Carbonsmentioning

confidence: 99%

“…Figure 14. Schematic illustrations of the first-discharge reaction mechanism of the GF/Li battery and the concept of regeneration of the fully-discharged GF/Li battery as a hybrid capacitor (in the case of only the Li + cation contributing to the charge-discharge process) 61. …”

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confidence: 99%

“…Figure 15. Ragone plots of the GF/Li capacitors (cell voltage: 2-4 V), the EDLC (cell voltage: 1.5-3 V), and the LIC (cell voltage: 2-4 V) 61. …”

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confidence: 99%

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Development of Novel Carbon Electrode for Electrochemical Energy Storage. Nano-sized Carbon and Classic Carbon Electrodes for Capacitors

Shiraishi

2021

Electrochemistry

Self Cite

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Electrochemical capacitors are energy storage devices characterized by high power and long cycle life for charging/discharging. Carbon materials play a very key role as electrode active materials for the electrochemical capacitors. This comprehensive paper mainly covers the author's research regarding the carbon materials as electrodes for the electric double layer capacitor used as an electrochemical capacitor. The importance of focusing on the pore structure, the surface chemistry, and the three-dimensional structure of the electrodes is stated from the viewpoint of improving the energy density and reliability, and the characteristic carbon materials that have a high capacitance even with a low microporosity are also reported. These research results indicate the potential of nano-sized carbons and classic carbons, such as activated carbon and graphite-related materials, to further develop the technologies of the capacitor electrodes.

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Transparent wafer-scale self-standing fluorinated graphene films

Colin

Chen

Farhat

et al. 2023

Carbon

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Regeneration of Fully-discharged Graphite-Fluoride Lithium Primary Battery as Electrochemical Capacitor

Cited by 5 publications

References 31 publications

Rechargeable Graphite Fluoride Electrodes Realized by Fluoride Anion Insertion and Deinsertion

Rechargeable Graphite Fluoride Electrodes Realized by Fluoride Anion Insertion and Deinsertion

Development of Novel Carbon Electrode for Electrochemical Energy Storage. Nano-sized Carbon and Classic Carbon Electrodes for Capacitors

Transparent wafer-scale self-standing fluorinated graphene films

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