Development and evaluation of Zn2+ ions hybrid supercapacitor based on ZnxMnO2-CNTs cathode

Ren, Danhong; Li, Xuan; Zhao, Xin-Hao; Liu, Baocheng; Yang, Zhengchun; He, Jie; Li, Tong; Pan, Peng

doi:10.1016/j.apenergy.2022.119730

Cited by 19 publications

(4 citation statements)

References 38 publications

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“…Moreover, a high-power density of ∼3.6 kW/kg could also be achieved with a corresponding energy density of ∼22 Wh/kg at a high current rate. Such energy-power performance is also comparable to other ZIHSCs reported in recent times (Figure S6 and Table ) including MSCP//ZnSO 4 //Zn, AC//ZnSO 4 //NVO, Zn x MnO 2 –CNTs//ZnSO 4 +MnSO 4 //AC, and MnO 2 //ZnSO 4 //AC …”

Section: Resultssupporting

confidence: 89%

Heteroatom Doping in Pollutant Diesel Soot-Derived Nanocarbon for Enhanced Zn-Ion Storage Performance

Aggarwal,

Gupta,

Awasthi

et al. 2024

Langmuir

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Herein, we have isolated onion-like nanocarbon (ONC) from the exhaust soot of diesel engines and further doped it with nitrogen (N) and sulfur (S) to fabricate N,S-co-doped ONC (N−S−ONC). To explore its application feasibility, we have assembled an aqueous Zn-ion hybrid supercapacitor (ZIHSC) with a N−S− ONC cathode, which attains high specific capacitance with good rate capability. Indepth analyses suggest that the mechanism of charge storage in the ONC is governed by both capacitive-controlled and diffusion-controlled processes, with the capacitive processes leading at all sweep rates. The ZIHSC demonstrated a good energy density of 50 Wh/kg, a maximum power density of 3.6 kW/kg, and an impressive cycle life with 73% capacitance retention after 50,000 charge−discharge cycles. The study suggests the potential possibly for the long-term application of BC derived nanocarbon in electrochemical energy storage systems (EESSs).

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Section: Resultssupporting

confidence: 89%

Heteroatom Doping in Pollutant Diesel Soot-Derived Nanocarbon for Enhanced Zn-Ion Storage Performance

Aggarwal,

Gupta,

Awasthi

et al. 2024

Langmuir

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“…This suggests a lower diffusion resistance and faster ion transport speed for the CVO electrode. These results confirm the beneficial effect of Cu doping on the conductivity performance of vanadium oxide, , supporting the significant enhancements in capacitance, conductivity, and cyclic stability observed for the CVO microspheres.…”

Section: Resultssupporting

confidence: 79%

Copper Vanadium Oxide Yolk–Shell Microspheres with Excellent Capacitance and Cycling Performance for Electrochromic Supercapacitor

Yang,

Chen,

Zhang

et al. 2024

ACS Appl. Mater. Interfaces

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Vanadium pentoxide (V 2 O 5 ) is considered a promising material for electrochromic supercapacitors due to its rich color transitions and excellent electrochemical capacity. However, V 2 O 5 exhibits low electrical conductivity, and its volume changes dramatically during charge−discharge cycles, leading to structural collapse and poor long-term cyclability. These issues have hindered the development and application of V 2 O 5 . In this study, copper vanadium oxide yolk−shell microspheres (CVO) were synthesized through a one-step solvent heat treatment with an annealing process. With the doping of copper element, the capacitance, conductivity, and cyclic stability of CVO microspheres were significantly enhanced. Subsequently, the sphere-wire network structure was formed by blending Na 2 V 6 O 16 •3H 2 O nanowires (NVO), resulting in the formation of CVO/NVO composites. The three-dimensional sphere-wire network efficiently facilitates the acquisition of additional redox sites and strengthens the material-to-substrate bonding. Under the combined influence of these favorable factors, CVO/NVO achieved a high specific capacitance of 39.2 mF cm −2 , with a capacitance retention of 84% after 7500 cycles at a current density of 0.7 mA cm −2 . The fully inorganic solid-state electrochromic supercapacitor (ECSC), assembled on the basis of CVO/NVO, demonstrates a vivid and clearly distinguishable color change (ΔE* = 37). Even more impressive is the energy storage capacity (18.4 mF•cm −2 ) and the cycling stability (up to 89% retention after 10,000 cycles) exhibited by the devices. These key performances are superior to those of most of the previously reported V 2 O 5 -based ECSCs, opening a promising avenue for the development of V 2 O 5 -based electrochromic energy storage devices.

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“…Similarly, Ren et al prepared Zn x MnO 2 -CNTs, which consisted of MnO 2 pre-intercalated with Zn 2+ ions and doped with CNTs, as the battery-type cathode and activated carbon (AC) as the capacitor-type anode in an aqueous electrolyte containing both Zn 2+ and Mn 2+ ions. 33 A maximum energy density of 15.65 W h kg À1 was reached at a power density of 1800 W kg À1 with this ZIHSC. In addition, its cycling stability was excellent, as it exhibited a capacity retention of 97.5% after 6000 discharge/ charge cycles.…”

Section: Transition Metal-based Materialsmentioning

confidence: 82%

“…Ren et al synthesized hybrid cathode material Zn x MnO 2 -CNTs. 33 In detail, 0.024 mol KMnO 4 and 0.024 mol Zn(NO 3 ) 2 Á6H 2 O were dissolved in 75 mL of deionized water followed by dropwise addition of 2 mL of H 2 SO 4 (98%) at room temperature under continuous stirring. The solution was then placed in an autoclave, sealed, and heated at 140 1C for 3.5 h. The resultant brown precipitate of Zn x MnO 2 nanowires was washed several times with DI and freeze-dried for 24 h. Similarly, Liang et al synthesized lamellar vanadium oxide as a cathode material.…”

Section: Synthesis Approaches Of Electrode Materials For Zihscsmentioning

confidence: 99%

Recent technological advances in designing electrodes and electrolytes for efficient zinc ion hybrid supercapacitors

et al. 2023

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Development and evaluation of Zn2+ ions hybrid supercapacitor based on ZnxMnO2-CNTs cathode

Cited by 19 publications

References 38 publications

Heteroatom Doping in Pollutant Diesel Soot-Derived Nanocarbon for Enhanced Zn-Ion Storage Performance

Heteroatom Doping in Pollutant Diesel Soot-Derived Nanocarbon for Enhanced Zn-Ion Storage Performance

Copper Vanadium Oxide Yolk–Shell Microspheres with Excellent Capacitance and Cycling Performance for Electrochromic Supercapacitor

Recent technological advances in designing electrodes and electrolytes for efficient zinc ion hybrid supercapacitors

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