V2O3/C nanocomposites with interface defects for enhanced intercalation pseudocapacitance

Zheng, Jiqi; Zhang, Yifu; Meng, Changgong; Wang, Xiaofei; Liu, Chaofeng; Bo, Mengke; Pei, Xiaoyu; Wei, Yuanan; Lv, Tianming; Cao, Guozhong

doi:10.1016/j.electacta.2019.06.125

Cited by 57 publications

(28 citation statements)

References 69 publications

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“…It presents a curve with a straight line in low-frequency region and a semicircle in high-frequency region. The semicircle diameter in high-frequency region signifies the interfacial charge-transfer resistance ( R ct ), which is dictated by the pore structure and the interfacial conductivity between the electrolyte and the electrode . The semicircle diameter of C/FeSi in Figure e is so small that it is almost invisible, implying an excellent charge-transfer performance.…”

Section: Resultsmentioning

confidence: 99%

“…The semicircle diameter in high-frequency region signifies the interfacial charge-transfer resistance (R ct ), which is dictated by the pore structure and the interfacial conductivity between the electrolyte and the electrode. 59 The semicircle diameter of C/ FeSi in Figure 4e is so small that it is almost invisible, implying an excellent charge-transfer performance. The data intercept in the high-frequency region that intersects the X axis stands for the equivalent series resistance (R s ).…”

Section: Methodsmentioning

confidence: 96%

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Bamboo Leaves as Sustainable Sources for the Preparation of Amorphous Carbon/Iron Silicate Anode and Nickel–Cobalt Silicate Cathode Materials for Hybrid Supercapacitors

Zhang

Wang

Chen

et al. 2021

ACS Appl. Energy Mater.

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The design and discovery of sustainable electrode materials with outstanding capacitance for energy storage from environmentally friendly biomass as the raw material are a task filled with challenges and opportunities. In this work, we demonstrate that the hybrid supercapacitor (HSC) device is assembled by metal silicates for the first time. The amorphous carbon/iron silicate (C/Fe 24 Si 4 O 43 (OH) 2 , denoted as C/FeSi) anode and cobalt−nickel silicate (Co x Ni 2−x SiO 4 , denoted as CoNiSi) cathode materials are derived naturally from bamboo leaves (BLs) for the HSC device. The BLs-derived C/ FeSi displays FeSi nanoparticles in situ growth on 3D hierarchical porous carbon, leading to high specific surface area, outstanding specific capacitance of 421 F•g −1 at 0.5 A•g −1 , and prominent cycle performance of 86% retention after 10 000 cycles. The CoNiSi presents a 3D petal-like sheet structure and exhibits excellent electrochemical properties with 368 F•g −1 (184 C•g −1 ) at 0.5 A•g −1 and 89% retention after 10 000 cycles. The fabricated quasi-solid-state C/FeSi// CoNiSi HSC device delivers a remarkable areal specific capacitance of 492 mF•cm −2 (96 F•g −1 ) at 4 mA•cm −2 and a brilliant energy density of 3.35 Wh•m −2 (6.55 Wh•kg −1 ) at 3.5 W•m −2 (68.36 W•kg −1 ), which are preferable to most of state-of-the-art silicates-based SCs. The series-wound C/FeSi//CoNiSi HSC device can light up the red LED for over 2 min. These strengths prove that both C/ FeSi and CoNiSi architectures derived from BLs can be regarded as hopeful and first-class electrode materials for SCs with excellent performance. This work not only supplies a potential thread for the construction of metal silicate architectures to recycle biomass rich in silicon to synthesize useful materials but also demonstrates that the high-performance HSC device can be achieved by using the biomass-derived silicates.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 96%

Bamboo Leaves as Sustainable Sources for the Preparation of Amorphous Carbon/Iron Silicate Anode and Nickel–Cobalt Silicate Cathode Materials for Hybrid Supercapacitors

Zhang

Wang

Chen

et al. 2021

ACS Appl. Energy Mater.

Self Cite

View full text Add to dashboard Cite

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“…The Nyquist plot of the VN/NCS electrode has a steeper slope, lower intercept with the x-axis, and smaller semicircle loop that the VN NW and NCS electrodes. This results in better capacitive behavior, lower intrinsic resistance (R s ), and lower charge transfer resistance (R ct ), 41,42 resulting in the better electrical conductivity of the VN/NCS electrode compared to that of the VN NW and NCS electrodes. 28,34 In addition to the favorable capacitance performance and electrical conductivity, the VN/NCS electrode also exhibits good cycling stability of 78% capacitance retention at a current density of 10 A g À1 aer 5000 cycles.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of a vanadium nitride/N-doped carbon hollow nanosphere composite as an efficient electrode material for asymmetric supercapacitors

Jiang

Lü

et al. 2020

Nanoscale Adv.

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“…One of the most feasible methods to enhance the electrochemical performance of V 2 O 3 consists of incorporating highly electrically conductive carbonaceous materials. Indeed, carbonaceous materials (such as porous carbon and graphene) can act as an elastic buffer layer to relieve the structural strain in V 2 O 3 during cycling, thus further improving the conductivity of the material [22][23][24][25][26][27][28][29][30]. In addition, the design of hollow structures is a popular way to optimize the rate capabilities of pseudocapacitance electrode materials without sacrificing their power density.…”

Section: Introductionmentioning

confidence: 99%

Enabling 2.4-V aqueous supercapacitors through the rational design of an integrated electrode of hollow vanadium trioxide/carbon nanospheres

et al. 2021

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Aqueous supercapacitors (SCs) exhibit several advantages, including high-power density, cycling durability, and safety; however, the shortage of low energy density inhibits their further application. Acquiring an excellent performance upon using simple strategies would be beneficial, but remains challenging. Here, an integrated electrode of hollow V 2 O 3 /carbon nanospheres (H-V 2 O 3 /C) was designed and synthesized for SCs. The introduction of carbon can increase the conductivity and stability, whereas the hollow structure endows H-V 2 O 3 /C with a high specific surface area and rapid transport of ions. Moreover, the H-V 2 O 3 /C integrated electrode can simultaneously work in both negative and positive potential windows. Benefiting from these advantages, the H-V 2 O 3 /C integrated electrode exhibits a specific capacitance as high as 708.6 F g −1 in a wide voltage window of −1.1-1.3 V. Furthermore, stemming from the multiple energy storage mechanisms, the aqueous integrated full SC device exhibits a wider potential window and higher energy density than the traditional (a)symmetric ones. Therefore, the proposed device delivers a wide voltage window of 2.4 V with an energy density of 96.8 W h kg −1 at a power density of 1204.6 W kg −1 , as well as superior cycling stability. This study enlightens the design and preparation of electrode materials, opening up a possible approach for developing wide-voltage aqueous SCs.

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V2O3/C nanocomposites with interface defects for enhanced intercalation pseudocapacitance

Cited by 57 publications

References 69 publications

Bamboo Leaves as Sustainable Sources for the Preparation of Amorphous Carbon/Iron Silicate Anode and Nickel–Cobalt Silicate Cathode Materials for Hybrid Supercapacitors

Bamboo Leaves as Sustainable Sources for the Preparation of Amorphous Carbon/Iron Silicate Anode and Nickel–Cobalt Silicate Cathode Materials for Hybrid Supercapacitors

Fabrication of a vanadium nitride/N-doped carbon hollow nanosphere composite as an efficient electrode material for asymmetric supercapacitors

Enabling 2.4-V aqueous supercapacitors through the rational design of an integrated electrode of hollow vanadium trioxide/carbon nanospheres

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