Defective synergy of 2D graphitic carbon nanosheets promotes lithium-ion capacitors performance

Li, Guangchao; Huang, Yaling; Yin, Zhoulan; Guo, Huajun; Liu, Yong; Cheng, Hua; Wu, Yuping; Ji, Xiaobo; Wang, Jiexi

doi:10.1016/j.ensm.2019.07.046

Cited by 49 publications

(29 citation statements)

References 59 publications

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“…The energy/power density indicators of LIHCs are shown in Figure g; they can reach up to 151 Wh kg –1 at 196.6 W kg –1 and maintain 42.6 Wh kg –1 at an ultrahigh power density of 21.9 kW kg –1 , which are the characteristics of integrated high power and high energy. Furthermore, the energy/power density indicators of LIHCs are superior to many recently reported LIHCs. − In terms of cycling stability, the assembled LIHCs deliver excellent cycle stability with a capacity retention of 79% over 1200 cycles at 1 A g –1 (Figure d). Interestingly, a “BUCT” pattern composed of dozens of yellow LEDs can be easily lighted up by these LIHCs (illustrations in Figure g) after fully charged at 1 A g –1 , demonstrating the promising application potential.…”

Section: Resultsmentioning

confidence: 94%

Multidimensional Dual-Carbon Skeleton Network Confined MnO_x Anode Boosting High-Performance Lithium-Ion Hybrid Capacitors

Cheng

Qiu

Kang

et al. 2021

ACS Appl. Energy Mater.

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Manganese oxide with high theoretical specific capacity and intermediate reaction plateau is a promising anode candidate for lithium-ion hybrid capacitors (LIHCs). However, the sluggish kinetics and severe volume expansion have seriously hindered its practical progress. Herein, a mixedvalence manganese oxide confined by a dual-carbon skeleton network (MnO x @ C-R) was successfully prepared. Owing to the synergistic effect of the introduction of the dual-carbon skeleton-network structure in a reducing atmosphere, the reasonable pore size distribution, crystallinity, and phase composition have been optimized. The material exhibits excellent lithium storage performance (778.2 mA h g −1 after 10 cycles at 0.1 A g −1 ), along with excellent rate performance (141.7 mA h g −1 at 5 A g −1 ) and stable cycling ability (402.4 m Ah g −1 for 1000 cycles at 1 A g −1 ). Moreover, further characterization displayed the change of the valence state of manganese during the charging/discharging, revealing the source of the excellent electrochemical performance of MnO

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Section: Resultsmentioning

confidence: 94%

Multidimensional Dual-Carbon Skeleton Network Confined MnO_x Anode Boosting High-Performance Lithium-Ion Hybrid Capacitors

Cheng

Qiu

Kang

et al. 2021

ACS Appl. Energy Mater.

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“…The current value i can be divided into two parts of the diffusion-controlled contributions (k 2 ν 1/2 ) and surface capacitive contributions (k 1 ν). 49 According to the formula 6, the ratio of the two parts contributions can be calculated. The capacitive contribution was calculated to be 23.3%, 31.7%, 38.9%, 68.6%, and 92.5% at the scan rate of 0.2, 0.5, 1, 5, and 10 mV s −1 , respectively (Figures 5d and S7).…”

Section: Resultsmentioning

confidence: 99%

“…To analyze the energy storage mechanism of MRPG/CNT as anode, the capacitive contribution is separated from the total capacity by the relationship of scan rates vs current responses. The relationship of the scan rates and current responses is described by the followed formulas: , In formula , a b -value of 1 indicates the reaction is a totally surface-dominated, referring to the surface faradaic pseudocapacitive and nonfaradaic double-layer reactions (capacitive behavior). A b -value of 0.5 shows a reaction controlled by semi-infinite diffusion, referring to the faradaic redox reaction from Li + intercalation/deintercalation (diffusion behavior) .…”

Section: Results and Discussionmentioning

confidence: 99%

Facile Synthesis of Graphene with Fast Ion/Electron Channels for High-Performance Symmetric Lithium-Ion Capacitors

Xiao

Liu

et al. 2021

ACS Appl. Mater. Interfaces

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With the battery-type anode and capacitor-type cathode, lithium-ion capacitors (LICs) are expected to exhibit both high energy and high power density but suffer from the mismatch of the electrode reaction kinetics and capacity. Herein, to alleviate the mismatch between the two electrodes and synergistically enhance the energy/power density, we design a method of microwave irradiation reduction to prepare graphene-based electrode material (MRPG/CNT) with fast ion/electron pathway. The threedimensional structure of CNT intercalation to graphene inhibits the restacking of graphene sheets and improves the conductivity of the electrode material, resulting a rapid ion and electron diffusion channel. Due to its specific properties, MRPG/CNT materials can be used as both anode and cathode electrodes of LICs at the same time. As anode, MRPG/CNT shows a high capacity of 1200 mAh g −1 as well as high rate performance. As cathode, MRPG/CNT displays a high capacity of 108 mAh g −1 and the capacity retention of 100% after 8000 cycles. Coupling the prelithiated MRPG/CNT anode with MRPG/CNT cathode gives a full-graphene-based symmetric LIC, which achieves a high energy density of 232.6 Wh kg −1 at 226.0 W kg −1 , 111.2 Wh kg −1 at the ultrahigh power density of 45.2 kW kg −1 , and superior capacity retention of 86% after 5000 cycles. The structure design of this electrode provides a new strategy for alleviating the mismatch of LIC electrodes and constructing high-performance symmetrical LICs.

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“…It has been well documented that advanced micro/nanostructure engineering can greatly enhance the Li þ storage capability by shortening the ion diffusion path and providing extra exposed active sites, and heteroatom doping can improve the Li þ storage performance by tuning the electronic structure and promoting the diffusion kinetics. [14,15] For example, Zhang and co-workers developed nitrogen-rich hollow carbon nanotubes via a template method using polypyrrole as the high-nitrogen-containing carbon precursor, which exhibited long-term cycling and a high rate property for Li þ storage. [16] Tai and co-workers prepared nitrogen/oxygen codoped graphene-like carbon nanocages, which delivered favorable electrolyte penetration and improved the kinetics for ion and electron transport, resulting in extraordinary electrochemical performance.…”

Section: Introductionmentioning

confidence: 99%

Hierarchical Carbon Nanosheet Assembly with SiO_x Incorporation and Nitrogen Doping Achieves Enhanced Lithium Ion Storage Performance

Wang

et al. 2021

Adv Energy and Sustain Res

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Lithium ion batteries (LIBs) have dominated the markets of portable electronics due to the merits of a low self‐discharge rate, high voltage platform, environmental friendliness, and portability. However, the limited theoretical capacity of the current commercial anode material causes unsatisfied energy density of LIBs, which falls behind the ever‐increasing demands of society. Herein, a hierarchical porous carbon nanosheet assembly is successfully constructed with simultaneous SiOx incorporation and nitrogen doping (denoted as HPCNA‐(N, Si)) through a supramolecular assembly–based one‐pot strategy followed by a calcination process. Benefitting from the unique morphology, highly porous feature, and the synergy of SiOx incorporation and nitrogen doping, the HPCNA‐(N, Si) exhibits largely enhanced Li+ storage performance when evaluated as anode material for LIBs. Specifically, it can deliver a high specific capacity of 583.0 mA h g−1 at 500 mA g−1 with a stable cycling capability (700 cycles with an average attenuation rate of 0.32% at 1000 mA g−1). The possible origins of the promising Li+ storage behavior for HPCNA‐(N, Si) are unraveled based on the cyclic voltammetry (CV) curves, where a fair capacitive contribution of 63.6% at 0.9 mV s−1 could imply fast ion transfer kinetics for superior rate and cycling performance.

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Defective synergy of 2D graphitic carbon nanosheets promotes lithium-ion capacitors performance

Cited by 49 publications

References 59 publications

Multidimensional Dual-Carbon Skeleton Network Confined MnO_x Anode Boosting High-Performance Lithium-Ion Hybrid Capacitors

Multidimensional Dual-Carbon Skeleton Network Confined MnO_x Anode Boosting High-Performance Lithium-Ion Hybrid Capacitors

Facile Synthesis of Graphene with Fast Ion/Electron Channels for High-Performance Symmetric Lithium-Ion Capacitors

Hierarchical Carbon Nanosheet Assembly with SiO_x Incorporation and Nitrogen Doping Achieves Enhanced Lithium Ion Storage Performance

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Defective synergy of 2D graphitic carbon nanosheets promotes lithium-ion capacitors performance

Cited by 49 publications

References 59 publications

Multidimensional Dual-Carbon Skeleton Network Confined MnOx Anode Boosting High-Performance Lithium-Ion Hybrid Capacitors

Multidimensional Dual-Carbon Skeleton Network Confined MnOx Anode Boosting High-Performance Lithium-Ion Hybrid Capacitors

Facile Synthesis of Graphene with Fast Ion/Electron Channels for High-Performance Symmetric Lithium-Ion Capacitors

Hierarchical Carbon Nanosheet Assembly with SiOx Incorporation and Nitrogen Doping Achieves Enhanced Lithium Ion Storage Performance

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Multidimensional Dual-Carbon Skeleton Network Confined MnO_x Anode Boosting High-Performance Lithium-Ion Hybrid Capacitors

Multidimensional Dual-Carbon Skeleton Network Confined MnO_x Anode Boosting High-Performance Lithium-Ion Hybrid Capacitors

Hierarchical Carbon Nanosheet Assembly with SiO_x Incorporation and Nitrogen Doping Achieves Enhanced Lithium Ion Storage Performance