Hybrid lithium-ion capacitors with asymmetric graphene electrodes

Sun, Yige; Tang, Jie; Qin, Faxiang; Yuan, Jinshi; Zhang, Kun; Li, Jing; Zhu, Da‐Ming; Qin, Lu‐Chang

doi:10.1039/c7ta01113j

Cited by 92 publications

(49 citation statements)

References 51 publications

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“…The Li metal electrode and the Batteries 2018, 4, 4 6 of 39 negative electrode are electronically isolated from each other and the negative electrode is charged with a low current or electrical shorting in order to perform lithiation. This process can be repeated for several charge/discharge cycles, for a defined period of time or until the electrode reaches a defined potential [30,34,53,54]. However, the electrochemical pre-lithiation process often requires a re-assembling step of the pre-lithiated negative electrode into the LIB cell, which increases the expenditure and reduces the possibility to use this method in a commercial way.…”

Section: Concepts For Electrochemical Pre-lithiationmentioning

confidence: 99%

“…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%

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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: Concepts For Electrochemical Pre-lithiationmentioning

confidence: 99%

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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“…Previous investigations on the reduced graphene oxides (rGO) have demonstrated that introducing extra spacers is an effective way to reduce this restacking. For example, Tang and co‐workers developed a single‐wall carbon nanotube and graphene (SG) composite to reduce restacking of the graphene nanosheets . As in the case of ACs, heteroatom doping can effectively improve the electrochemical performance of graphene‐based cathode by enhancing the conductivity and providing pseudocapacitive active sites.…”

Section: Materials For Sodium‐ion Capacitorsmentioning

confidence: 99%

Advanced Materials for Sodium‐Ion Capacitors with Superior Energy–Power Properties: Progress and Perspectives

Zhang

et al. 2019

Small

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The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10. 1002/smll.201902843. Developing electrochemical energy storage devices with high energy-power densities, long cycling life, as well as low cost is of great significance. Sodium-ion capacitors (NICs), with Na + as carriers, are composed of a high capacity battery-type electrode and a high rate capacitive electrode. However, unlike their lithium-ion analogues, the research on NICs is still in its infancy. Rational material designs still need to be developed to meet the increasing requirements for NICs with superior energy-power performance and low cost. In the past few years, various materials have been explored to develop NICs with the merits of superior electrochemical performance, low cost, good stability, and environmental friendliness. Here, the material design strategies for sodium-ion capacitors are summarized, with focus on cathode materials, anode materials, and electrolytes. The challenges and opportunities ahead for the future research on materials for NICs are also proposed. www.advancedsciencenews.com www.small-journal.com to LICs, NICs are still in their infancy stage with many difficulties for their practical application. [23] For example, many battery-type electrode materials for lithium ion storage cannot meet the requirements of NIC devices due to the large size of Na + ions. In addition, due to the redox potential of Na/Na + is 0.3 V higher than that of Li/Li + , the working voltage ranges of NICs are expected to be a little narrower than LICs, which may influence the energy densities of NICs. Moreover, the electrolyte should provide a rapid migration process of Na + ions. Therefore, the rational material design will play crucial roles in the electrochemical performance improvement of NICs.So far, there are few papers which summarize the recent progress in NIC research area. In particular, the materials used in NICs, including anode, cathode, and electrolyte, have not been systematically reviewed. In this article, we focus on the latest advances in the cathode materials, anode materials, and electrolytes for NICs. First, we review the energy storage mechanism and demonstrate the configurations of NICs; then, we summarize the recent progress on electrode materials, including anode materials, cathode materials, as well as different electrolytes for NICs; finally, the challenges and future prospects for NIC research are proposed.

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“…For example, Sun et al [54] prepared a single-wall carbon nanotube (SWCNT) and graphene composite (SG). For example, Sun et al [54] prepared a single-wall carbon nanotube (SWCNT) and graphene composite (SG).…”

Section: Graphenementioning

confidence: 99%

Recent Advances and Challenges of Two‐Dimensional Materials for High‐Energy and High‐Power Lithium‐Ion Capacitors

Hou

Qin

et al. 2019

Batteries & Supercaps

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ion capacitors (LICs) composed of a battery-type electrode and a capacitor-type electrode are highly competitive candidates for next-generation electrochemical energy storage devices, simultaneously achieving high energy and power densities. However, the present LICs are still hindered by the imbalance of electrode kinetics and capacity of anode and cathode. Recently, two-dimensional (2D) materials with unique structure and appealing properties have received extensive attentions for applications in LICs, with remarkable improvements from charge storage capacity to reaction kinetics. Herein, we review the recent advances in the applications of 2D materials for high-energy and high-power LICs. The key advantages and important roles of 2D materials are emphasized for the construction of LICs, including electrochemical active materials, ultrathin conductive and flexible supports for hybridization with other active materials, and 2D functional building blocks for assembling macroscopic hierarchical 3D frameworks. Finally, the challenges and prospects associated with the applications of 2D materials for high-performance LICs are discussed. especially power density and cycle life, nanostructured battery-type materials with high rate capability and long-term stability and optimized capacitor-type materials with high capacity should be continuously developed. [5][6]10] 2D materials are layered crystals with a thickness of single or few atoms, and often referred to nanosheets as well. [25] These ultrathin 2D nanosheets can be considered as elementary building blocks of the corresponding layered bulk materials and can be synthesized by exfoliation of the latter. Since graphene was discovered in 2004, [26] various 2D materials have been developed, including transition metal oxides (TMOs), transition metal dichalcogenides (TMDs), MXenes, polymers, phosphorene, boron nitride, etc. [27] The atomic-level thickness brings extraordinary physicochemical properties compared with the multilayer bulk materials, such as high SSA, excellent mechanical flexibility, tunable electronic structure, and enhanced electrochemical activities, making 2D materials highly attractive for electrochemical energy storage devices. [28] Also, the introduction of 2D materials has enabled great progress toward LICs with high energy density, high power density, and long cycle life.

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Hybrid lithium-ion capacitors with asymmetric graphene electrodes

Abstract: A dual-graphene LIC delivered a high energy density of 222 W h kg−1 with a power density of 410 W kg−1.

Cited by 92 publications

References 51 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

Advanced Materials for Sodium‐Ion Capacitors with Superior Energy–Power Properties: Progress and Perspectives

Recent Advances and Challenges of Two‐Dimensional Materials for High‐Energy and High‐Power Lithium‐Ion Capacitors

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