High energy density Li-ion capacitor assembled with all graphene-based electrodes

Zhang, Tengfei; Zhang, Fan; Zhang, Long; Lu, Yanhong; Zhang, Yi; Yang, Xi; Ma, Yanfeng; Huang, Yi

doi:10.1016/j.carbon.2015.03.032

Cited by 163 publications

(119 citation statements)

References 60 publications

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“…The results are represented by the Nyquist plots shown in Figure 7. The inset shows an enlarged portion of the Nyquist plots to PF16/flash reduced GO (PF16 = -148.3 7.8 [50] graphene-based material)…”

Section: Resultsmentioning

confidence: 99%

High‐Energy‐Density Supercapacitors Based on Patronite/Single‐Walled Carbon Nanotubes/Reduced Graphene Oxide Hybrids

et al. 2015

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Section: Resultsmentioning

confidence: 99%

High‐Energy‐Density Supercapacitors Based on Patronite/Single‐Walled Carbon Nanotubes/Reduced Graphene Oxide Hybrids

et al. 2015

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“…The LIC performance is comparable to graphite//functionalized graphene [17], graphitic carbon//AC [33], LIC in terms of energy density, and Fe 3 O 4 /graphene//Porous three-dimensional (3D) graphene LIC system considering power density [11]. Its performance is however lower than flash-reduced graphene oxide//porous 3D graphene LIC, which is a fully optimized system [12]. The electrochemical performance of our LIC system is conceivably limited by capacity and ion transport kinetics mismatch between the two electrodes that exhibit dissimilar storage mechanisms (intercalation/deintercalation mechanism at anode side and EDLC mechanism at the cathode).…”

Section: Resultsmentioning

confidence: 94%

“…It is expected that LIC energy density can be improved by utilizing electrodes that are capable of offering higher specific capacity in place of traditional activated carbon and graphite. Owing to the advantageous properties of graphene in terms of specific capacity, specific surface area (SSA), chemical stability, and electrical conductivity, many studies have demonstrated high performance LIC using graphene-based electrodes [3,8,[10][11][12][13][14][15][16][17]. In recent years, more efforts are being made to fine-tune the material to further enhance its properties to advance the electrochemical performance of LICs.…”

Section: Introductionmentioning

confidence: 99%

Electrostatically Sprayed Reduced Graphene Oxide-Carbon Nanotubes Electrodes for Lithium-Ion Capacitors

Adelowo¹,

Baboukani²,

Chen³

et al. 2018

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Lithium-ion capacitors (LICs) comprising capacitor-type and battery-type electrodes are promising electrochemical energy storage systems to effectively combine the merits of lithium-ion batteries (LIBs) and electrochemical capacitors (ECs). It is expected that the energy density of LICs can be improved by utilizing electrodes that are capable of providing high specific capacity. Herein, we demonstrate a graphene-based LIC with reduced graphene oxide-carbon nanotube (rGO-CNT) film as capacitor-type electrode and pre-lithiated rGO-CNT film as battery-type electrode using 1 M LiPF 6 in EC: EMC electrolyte. The rGO-CNT was prepared by electrostatic spray deposition (ESD), which offers advantages, such as simultaneous reduction and binder-free deposition of GO on a current collector and facile morphology control. The rGO-CNT shows high specific capacity and good cyclability as both capacitor-type and battery-type electrode materials. The rGO-CNT//lithiated rGO-CNT LIC delivered energy densities as high as 114.5 Wh kg −1 and maximum power density of 2569 W kg −1 . This indicates the promising potential of the ESD approach for the facile fabrication of graphene-based electrodes for high performance LICs.

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“…因此, 与传统的电容器相比, 锂离子电容器的性能介于 SC 和 LIB 之间 [16] . 与超级电容器相比, LIC 可提高 SC 的工作电压, 从而获得更高的重量能量密度和体积能量密度; 与电池相比, LIC 可缩短充放电时间, 具有更高的比功率 [17,18] . 因此, LIC 的应用可以使动力汽车不再需要通过复杂的系统管理与控制来同时解决能量密度和功率密度两个问题, 很大程度上解决了目前动力汽车由于单独使用超级电容器而造成的能量密度低或由于单使用电池而存在的比功率低、充电时间长等问题 [19] .…”

Section: Sc)unclassified

All Graphene Lithium Ion Capacitor with High-Energy-Power Density Performance

Gu¹,

Hong²,

Ai³

et al. 2018

Acta Chim. Sinica

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Taking advantage of the extended specific surface area and high conductivity, graphene has been widely subjected to extensive investigations by many research groups. Herein, three-dimensional graphene (3DG) were prepared by a facile and scalable ion-exchange method, which exhibited a porous structure with a specific surface area of 2400 m 2 /g and pore volume of 2.0 cm 3 /g. In a typical synthesis, two key procedures played an important role in preparing the novel characteristics of 3DG: First, metal ions were used as the catalysis to graphitize the ion-exchange resin. Second, an KOH activation step at low temperatures (800 ℃) was applied on the exchange resin to produce a hierarchical porous structure of 3DG materials. The method of catalysis, chemical activation and heating treatment can form a unique interconnected structure and also effectively prevent graphene nanosheets from aggregating. Various structural and morphology analyses have been characterized by X-ray powder diffraction, Raman, Scanning electron microscope and Transmission electron microscope. Additionally, the enhanced specific surface area can improve capacitor performance of 3DG, which exhibited a high specific capacitance of 250 F/g when measured in a three-electrode system (KOH aqueous solution) and 120 F/g in a symmetric supercapacitor (TEMABF 4 /PC organic electrolytes). Furthermore, the as-prepared 3DG were successfully employed as both cathode and anode active materials for lithium ion capacitors (3DG-LIC) with high energy density (105 Wh/kg) because the potential window of 3DG-LIC extended from 2.5 to 4.0 V compared to traditional supercapacitor (SC) by prelithiation of anode. The performance and operating mechanism of 3DG-LIC were further studied by cyclic voltammetry, galvanostatic charge/discharge, and electrochemical impedance spectroscopy. The similar chemistry and microstructure maximizes the capacity and rate performance of cathode and anode, which indicates that the 3DG-LIC can be a promising candidate for high-energypower storage system and would have a wide application in other electrochemical applications.

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High energy density Li-ion capacitor assembled with all graphene-based electrodes

Cited by 163 publications

References 60 publications

High‐Energy‐Density Supercapacitors Based on Patronite/Single‐Walled Carbon Nanotubes/Reduced Graphene Oxide Hybrids

High‐Energy‐Density Supercapacitors Based on Patronite/Single‐Walled Carbon Nanotubes/Reduced Graphene Oxide Hybrids

Electrostatically Sprayed Reduced Graphene Oxide-Carbon Nanotubes Electrodes for Lithium-Ion Capacitors

All Graphene Lithium Ion Capacitor with High-Energy-Power Density Performance

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