A fast and efficient pre-doping approach to high energy density lithium-ion hybrid capacitors

Kim, Minho; Xu, Fan; Lee, Jun Young; Jung, Cheolsoo; Hong, Soon Man; Zhang, Q. M.; Koo, Chong Min

doi:10.1039/c4ta00678j

Cited by 82 publications

(50 citation statements)

References 48 publications

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“…All techniques and methods described above can be applied for the pre-lithiation of LICs, such as the electrochemical pre-lithiation [54,157,160,161], the pre-lithiation with additives inside the negative or positive electrode [162][163][164] or the pre-lithiation through direct contact with Li metal [165,166]. In contrast to pre-lithiation of LIBs, pre-lithiated LICs are already commercially available as described in the followings section.…”

Section: Pre-lithiation In Lithium-ion Capacitorsmentioning

confidence: 99%

Pre-Lithiation Strategies for Rechargeable Energy Storage Technologies: Concepts, Promises and Challenges

et al. 2018

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Abstract:In order to meet the sophisticated demands for large-scale applications such as electro-mobility, next generation energy storage technologies require advanced electrode active materials with enhanced gravimetric and volumetric capacities to achieve increased gravimetric energy and volumetric energy densities. However, most of these materials suffer from high 1st cycle active lithium losses, e.g., caused by solid electrolyte interphase (SEI) formation, which in turn hinder their broad commercial use so far. In general, the loss of active lithium permanently decreases the available energy by the consumption of lithium from the positive electrode material. Pre-lithiation is considered as a highly appealing technique to compensate for active lithium losses and, therefore, to increase the practical energy density. Various pre-lithiation techniques have been evaluated so far, including electrochemical and chemical pre-lithiation, pre-lithiation with the help of additives or the pre-lithiation by direct contact to lithium metal. In this review article, we will give a comprehensive overview about the various concepts for pre lithiation and controversially discuss their advantages and challenges. Furthermore, we will critically discuss possible effects on the cell performance and stability and assess the techniques with regard to their possible commercial exploration.

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Section: Pre-lithiation In Lithium-ion Capacitorsmentioning

confidence: 99%

Pre-Lithiation Strategies for Rechargeable Energy Storage Technologies: Concepts, Promises and Challenges

et al. 2018

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“…The experimental procedure to fabricate GIC was inspired by the work done by Kim et al [31] and Park et al [32]. Sodium ingot was flattened using a roller in order to use it as a foil.…”

Section: Fabrication Of Gicmentioning

confidence: 99%

Synthesis of Graphene Nanosheets through Spontaneous Sodiation Process

Thomas

Kavak

Hashemi

et al. 2018

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Abstract:Graphene is one of the emerging materials in the nanotechnology industry due to its potential applications in diverse areas. We report the fabrication of graphene nanosheets by spontaneous electrochemical reaction using solvated ion intercalation into graphite. The current literature focuses on the fabrication of graphene using lithium metal. Our procedure uses sodium metal, which results in a reduction of costs. Using various characterization techniques, we confirmed the fabrication of graphene nanosheets. We obtained an intensity ratio (I D /I G ) of 0.32 using Raman spectroscopy, interlayer spacing of 0.39 nm and our XPS results indicate that our fabricated compound is relatively oxidation free.

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“…Besides, the exothermic heat of intercalation reaction can be quickly dissipated without any potential safety hazards. 20,21 In this work, we report high performance LICs with activated carbon as cathodes and pre-lithiated carbon nanotube as anodes. The pre-lithiation was prepared by ISC approach.…”

Section: Introductionmentioning

confidence: 99%

“…For example, EC process requires repeated assembly and disassembly of batteries, which resulted in unnecessary waste of human and material resources. [16][17][18][19][20][21] Internal shortcircuit (ISC) method is also called direct contact (DC) method. The pre-lithiation can be achieved through direct physical contact between negative electrode and lithium metal with electrolyte in pressure.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Performance of Lithium-Ion Capacitors Using Pre-Lithiated Multiwalled Carbon Nanotubes as Anode

Cai

Sun

Nie

et al. 2017

NANO

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Pre-lithiated multiwalled carbon nanotube anode was prepared by internal short circuit approach (ISC) for 5 min, 30 min, 60 min and 120 min respectively. Lithium ion capacitors (LICs) were assembled by using pre-lithiated multiwalled carbon nanotubes as anodes and activated carbon (AC) as cathodes. The structure of multiwalled carbon nanotubes and electrodes were investigated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The electrochemical performance of pre-lithiated multiwalled carbon nanotube electrodes and pristine carbon nanotube electrodes were tested by galvanostatic charge/discharge and electrochemical impedance. The results indicated that pre-lithiation carbon nanotubes greatly improved the charge/discharge performance of LICs. The energy density was four times than conventional electric double-layer capacitors (EDLCs) at the current density of 100 mA/g. The LICs achieved a speci¯c capacitance of 59.3 F/g at the current density of 100 mA/g with 60 min pre-lithiatiation process. The maximum energy density and power density was 96 Wh/kg and 4035 W/kg, respectively. The energy density still remained about 89.0% after 1000 cycles. The LIC showed excellent supercapacitor performance.

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A fast and efficient pre-doping approach to high energy density lithium-ion hybrid capacitors

Abstract: We demonstrate that the internal short (IS) approach is a fast and efficient process for lithium pre-doping in lithium-ion capacitors.

Cited by 82 publications

References 48 publications

Pre-Lithiation Strategies for Rechargeable Energy Storage Technologies: Concepts, Promises and Challenges

Pre-Lithiation Strategies for Rechargeable Energy Storage Technologies: Concepts, Promises and Challenges

Synthesis of Graphene Nanosheets through Spontaneous Sodiation Process

Electrochemical Performance of Lithium-Ion Capacitors Using Pre-Lithiated Multiwalled Carbon Nanotubes as Anode

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