A new cathode material of NiF2 for thermal batteries with high specific power

Chang, Qing; Luo, Zeshunji; Fu, Licai; Zhu, Jiajun; Yang, Wulin; Li, Deyi; Zhou, Lingping

doi:10.1016/j.electacta.2020.137051

Cited by 35 publications

(17 citation statements)

References 45 publications

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“…(a) Discharge specific capacity of 2NCN and 5NCN samples at 100 mA cm –2 at 500 °C; (b) discharge capacity of the 5NCN sample at 50, 100, 300, and 500 mA cm –2 at 500 °C; (c) discharge capacity of the 5NCN sample at 100 mA cm –2 at 450, 475, 500, and 525 °C; (d) comparison of the specific capacity and peak voltage of different cathode materials for Li thermal batteries reported in the literature; ,,− (e) pulse discharge curve and internal resistance of 2NCN and 5NCN with a pulse current density of 300 mA cm –2 for 2 s every 30 s under a constant current density of 100 mA cm –2 ; (f) EIS curves of 2NCN and 5NCN electrodes.…”

Section: Resultsmentioning

confidence: 99%

In Situ Fabrication of NiS₂ Nanoparticle-Coated g-C₃N₄ as a Cathode for Enhanced Lithium Thermal Battery Performance

Meng

Liu

et al. 2022

J. Phys. Chem. C

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Nickel disulfide-coated graphitic carbon nitride (NiS2@g-C3N4) cathode materials for Li thermal batteries were successfully constructed using nickel nitrate hexahydrate and thiourea via a one-step solid-state combustion process. In this process, thiourea not only provides a sulfur source but also can undergo in situ polycondensation to produce a g-C3N4 coating. g-C3N4 as a protective layer helps to improve the thermal stability of NiS2 for prolonging the discharge time. Moreover, the inherent porosity of g-C3N4 provides sufficient channels for ion/electron transport to ameliorate electronic conductivity. Therefore, the prepared NiS2@g-C3N4 exhibits an impressive discharge specific capacity and specific energy of 572.4 mAh g–1 and 1001.6 Wh kg–1, respectively, at 100 mA cm–2 with a cut-off voltage of 1.5 V at 450 °C. It still delivers a specific capacity as high as 410.2 mAh g–1 even at a larger current density of 500 mA cm–2. Furthermore, the discharge reaction of NiS2@g-C3N4 is investigated using ex situ X-ray powder diffraction and transmission electron microscopy. Thus, this study offers a feasible preparation method for advanced transition metal sulfide cathode materials to benefit their large-scale application in Li thermal batteries.

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Section: Resultsmentioning

confidence: 99%

In Situ Fabrication of NiS₂ Nanoparticle-Coated g-C₃N₄ as a Cathode for Enhanced Lithium Thermal Battery Performance

Meng

Liu

et al. 2022

J. Phys. Chem. C

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“…As shown in Figure S9a, Supporting Information, the Ni 2+ 2p 3/2 peak located at 857.9 eV for the as-prepared KNFF2 perovskite is well indexed to the reported Ni-F bond. [32] As a contrast, the Ni 2+ 2p 3/2 peak for the KNFF2 post-OER shifts to a lower binding energy of 855.7 eV, corresponding to the created (NiFe)(OH) 2 . Besides, a Ni 3+ 2p 3/2 peak at 857.3 eV is also obtained after OER test probably due to the existence of 𝛾-(NiFe)OOH.…”

Section: Dynamic Surface Reconstructionmentioning

confidence: 94%

Probing Dynamic Self‐Reconstruction on Perovskite Fluorides toward Ultrafast Oxygen Evolution

Zhang

Wang

et al. 2022

Advanced Science

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Exploring low cost, highly active, and durable electrocatalysts for oxygen evolution reaction (OER) is of prime importance to boost energy conversion efficiency. Perovskite fluorides are emerging as alternative electrocatalysts for OER, however, their intrinsically active sites during real operation are still elusive. Herein, the self‐reconstruction on newly designed NiFe coupled perovskite fluorides during OER process is demonstrated. In situ Raman spectroscopy, ex situ X‐ray absorption spectroscopy, and theoretical calculation reveal that Fe incorporation can significantly activate the self‐reconstruction of perovskite fluorides and efficiently lower the energy barrier of OER. Benefiting from self‐reconstruction and low energy barrier, the KNi0.8Fe0.2F3@nickel foam (KNFF2@NF) electrocatalyst delivers an ultralow overpotential of 258 mV to afford 100 mA cm−2 and an excellent durability for 100 h, favorably rivaling most the state‐of‐the‐art OER electrocatalysts. This protocol provides the fundamental understanding on OER mechanism associated with surface reconstruction for perovskite fluorides.

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“…Transition metal fluorides (TMFs) have attracted much attention because of their high voltage, specific energy, and excellent thermal stability ( Yamakawa et al, 2009 ; Kim et al, 2010 ; Chun et al, 2016 ; Sheng Nan Guo and Wang, 2019 ; Chang et al, 2020 ). The ionic bond property of TMFs results in a high working potential ( Li et al, 2012 ).…”

Section: Transition Metal Fluoridesmentioning

confidence: 99%

“…The theoretical potential of NiF 2 is 2.96 V, and the specific capacity is 554 mAh/g. Chang prepared pure NiF 2 via a direct and simple two-step dehydration method from commercial NiF 2 .4H 2 O ( Chang et al, 2020 ). The discharge mechanism was as follows:

…”

Section: Transition Metal Fluoridesmentioning

confidence: 99%

Recent Developments of Cathode Materials for Thermal Batteries

Guo

Qian

2022

Front. Chem.

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Big progress has been made in batteries based on an intercalation mechanism in the last 20 years, but limited capacity in batteries hinders their further increase in energy density. The demand for more energy intensity makes research communities turn to conversion-type batteries. Thermal batteries are a special kind of conversion-type battery, which are thermally activated primary batteries composed mainly of cathode, anode, separator (electrolyte), and heating mass. Such kinds of battery employ an internal pyrotechnic source to make the battery stack reach its operating temperature. Thermal batteries have a long history of research and usage in military fields because of their high specific capacity, high specific energy, high thermal stability, long shelf life, and fast activation. These experiences and knowledge are of vital importance for the development of conversion-type batteries. This review provides a comprehensive account of recent studies on cathode materials. The paper covers the preparation, characterization of various cathode materials, and the performance test of thermal batteries. These advances have significant implications for the development of high-performance, low-cost, and mass production conversion-type batteries in the near future.

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A new cathode material of NiF2 for thermal batteries with high specific power

Cited by 35 publications

References 45 publications

In Situ Fabrication of NiS₂ Nanoparticle-Coated g-C₃N₄ as a Cathode for Enhanced Lithium Thermal Battery Performance

In Situ Fabrication of NiS₂ Nanoparticle-Coated g-C₃N₄ as a Cathode for Enhanced Lithium Thermal Battery Performance

Probing Dynamic Self‐Reconstruction on Perovskite Fluorides toward Ultrafast Oxygen Evolution

Recent Developments of Cathode Materials for Thermal Batteries

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A new cathode material of NiF2 for thermal batteries with high specific power

Cited by 35 publications

References 45 publications

In Situ Fabrication of NiS2 Nanoparticle-Coated g-C3N4 as a Cathode for Enhanced Lithium Thermal Battery Performance

In Situ Fabrication of NiS2 Nanoparticle-Coated g-C3N4 as a Cathode for Enhanced Lithium Thermal Battery Performance

Probing Dynamic Self‐Reconstruction on Perovskite Fluorides toward Ultrafast Oxygen Evolution

Recent Developments of Cathode Materials for Thermal Batteries

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In Situ Fabrication of NiS₂ Nanoparticle-Coated g-C₃N₄ as a Cathode for Enhanced Lithium Thermal Battery Performance

In Situ Fabrication of NiS₂ Nanoparticle-Coated g-C₃N₄ as a Cathode for Enhanced Lithium Thermal Battery Performance