Pseudocapacitance contribution in boron-doped graphite sheets for anion storage enables high-performance sodium-ion capacitors

Yu, Feng; Liu, Zaichun; Zhou, Renwu; Tan, Deming; Wang, Hongxia; Wang, Faxing

doi:10.1039/c8mh00156a

Cited by 125 publications

(75 citation statements)

References 73 publications

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“…If one anode (cathode) has good power (energy) performance, then the NIC has proportionally good power (energy) performance (Figure b). The NICs listed in Figure c include various carbon‐based systems . Our system based on the configuration CHKM800//CNC1000 possesses a promising energy‐power performance as well as a low‐cost and easy fabrication process.…”

Section: Resultsmentioning

confidence: 99%

All‐Cellulose‐Based Quasi‐Solid‐State Sodium‐Ion Hybrid Capacitors Enabled by Structural Hierarchy

Xie

Wang

et al. 2019

Adv Funct Materials

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Na-ion hybrid capacitors consisting of battery-type anodes and capacitorstyle cathodes are attracting increasing attention on account of the abundance of sodium-based resources as well as the potential to bridge the gap between batteries (high energy) and supercapacitors (high power). Herein, hierarchically structured carbon materials inspired by multiscale building units of cellulose from nature are assembled with cellulose-based gel electrolytes into Na-ion capacitors. Nonporous hard carbon anodes are obtained through the direct thermal pyrolysis of cellulose nanocrystals. Nitrogendoped carbon cathodes with a coral-like hierarchically porous architecture are prepared via hydrothermal carbonization and activation of cellulose microfibrils. The reversible charge capacity of the anode is 256.9 mAh g −1 when operating at 0.1 A g −1 from 0 to 1.5 V versus Na + /Na, and the discharge capacitance of cathodes tested within 1.5 to 4.2 V versus Na + /Na is 212.4 F g −1 at 0.1 A g −1 . Utilizing Na + and ClO 4 − as charge carriers, the energy density of the full Na-ion capacitor with two asymmetric carbon electrodes can reach 181 Wh kg −1 at 250 W kg −1 , which is one of the highest energy devices reported until now. Combined with macrocellulose-based gel electrolytes, all-cellulose-based quasi-solid-state devices are demonstrated possessing additional advantages in terms of overall sustainability.reserves and their localized geographical availability. [1][2][3] In order to fulfill the complex electrochemical demands of future applications, the development of Na-based energy storage devices with both high energy and power density is of vital importance and necessity; therefore, Na-ion capacitors (NICs) combining a capacitorstyle cathode with a battery-style anode are attractive to balance the gap between batteries and supercapacitors. [4][5][6] To develop cost-competitive NICs, finding low-cost but highly performant materials based on available resources for both electrodes and electrolytes is crucial, particularly when the entire technological scale from synthesis and manufacturing to application and recycling is considered. Recently, significant research efforts have been made to develop novel materials (MoS 2 /MoSe 2 , metal oxide, carbon, etc.) as electrodes for NICs. [7][8][9][10] Among them, sustainable carbon materials inspired from nature, one significant division of the fourth-generation (4G) clean energy technologies, have become one of the up-and-coming candidates for NICs because of their countless advantages including high electrical conductivity, tunable structures, low cost, and stable physicochemical properties. [11][12][13][14] Battery-behaving anodes such as hard carbons have shown promising sodium storage performance and a low volume expansion compared Sodium-Ion CapacitorsThe ORCID identification number(s) for the author(s) of this article can be found under https://doi.

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Section: Resultsmentioning

confidence: 99%

All‐Cellulose‐Based Quasi‐Solid‐State Sodium‐Ion Hybrid Capacitors Enabled by Structural Hierarchy

Xie

Wang

et al. 2019

Adv Funct Materials

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“…The large voltage window of 4.5 V is attributed to B atoms in the composite. Moreover, the doped atoms can significantly promote PF 6 − diffusion in the BCN layers, which enhanced energy density of the assembled LIC device . Figure f shows cycling performance of the electrode after 10 000 cycles, and BCN presented 96.5% capacity retention relative to the initial value at 5 A g −1 .…”

Section: Resultsmentioning

confidence: 99%

High‐Energy Density Li‐Ion Capacitor with Layered SnS₂/Reduced Graphene Oxide Anode and BCN Nanosheet Cathode

Hao

Wang

Shao

et al. 2019

Advanced Energy Materials

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Lithium‐ion capacitors (LICs) with capacitor‐type cathodes and battery‐type anodes are considered a promising next‐generation advanced energy storages system that meet the requirements of high energy density and power density. However, the mismatch of charge‐storage capacity and electrode kinetics between positive and negative electrodes remains a challenge. Herein, layered SnS2/reduced graphene oxide (RGO) nanocomposites are developed for negative electrodes and a 2D B/N codoped carbon (BCN) nanosheet is designed for the positive electrode. The SnS2/RGO derived from SnS2‐bonded RGO of high conductivity exhibits a capacity of 1198 mA h g−1 at 100 mA g−1. Boron and nitrogen atoms in BCN are found to promote adsorption of anions, which enhance the pseudocapacitive contribution as well as expanding the voltage of LICs. A quantitative kinetics analysis indicates that the SnS2/RGO electrodes with a dominating capacitive mechanism and a diminished intercalation process, benefit the kinetic balance between the two electrodes. With this particular structure, the LIC is able to operate at the highest operating voltage for these devices recorded to date (4.5 V), exhibiting an energy density of 149.5 W h kg−1, a power density of 35 kW kg−1, and a capacity retention ratio of 90% after 10 000 cycles.

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“…The most common electrolytes for DCBs are organic carbonates and ionic liquid (IL) solvents paired with various inorganic/organic salts such as LiPF 6 , NaPF 6 , and n‐butyl pyridinium [PF 6 ] . Their concentration is usually set to be between 0.5 and 2 mol L −1 to ensure high ionic conductivity and low viscosity.…”

Section: Conventional Liquid Electrolytesmentioning

confidence: 99%

“…The most common electrolytes for DCBs are organic carbonates and ionic liquid (IL) solvents paired with various inorganic/ organic salts such as LiPF 6 , NaPF 6 , and n-butyl pyridinium [PF 6 ]. [26][27][28][29][30][31][32][33][34][35][36][37][38] Their concentration is usually set to be between 0.5 and 2 mol L À 1 to ensure high ionic conductivity and low viscosity. These electrolytes, however, suffer from severe decomposition on carbonaceous cathodes and/or anodes because of the superior catalytic activity of the defects in carbonaceous materials, [39][40][41] causing unsatisfactory Coulombic efficiency (CE) and inferior cycling performance of DCBs.…”

Section: Conventional Liquid Electrolytesmentioning

confidence: 99%

Electrolytes for Dual‐Carbon Batteries

Jiang

Luo

Zhong³

et al. 2019

ChemElectroChem

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Dual‐carbon batteries (DCBs) are a promising candidate for smart grid applications, owing to their low cost, high power capability, and environmentally friendly benefits. As an essential component of DCBs, electrolytes not only act as a medium for ion migration during the running of the battery, but also provide active ions to be intercalated into carbon electrodes, exerting significant impacts on the electrochemical performance and safety of the DCB. In this Review, we discuss recent progress in electrolyte research for DCBs, including conventional liquid electrolytes, highly concentrated electrolytes, and gel polymer electrolytes, with a focus on their stability and compatibility with carbon electrodes. Finally, we present perspectives on the current limitations and future research directions of electrolytes for DCBs. Some recommendations for battery evaluation are also offered.

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Pseudocapacitance contribution in boron-doped graphite sheets for anion storage enables high-performance sodium-ion capacitors

Abstract: The high pseudocapacitance contribution in boron-doped graphite sheets for anion storage is demonstrated, and then utilized to fabricate Na-ion hybrid capacitors.

Cited by 125 publications

References 73 publications

All‐Cellulose‐Based Quasi‐Solid‐State Sodium‐Ion Hybrid Capacitors Enabled by Structural Hierarchy

All‐Cellulose‐Based Quasi‐Solid‐State Sodium‐Ion Hybrid Capacitors Enabled by Structural Hierarchy

High‐Energy Density Li‐Ion Capacitor with Layered SnS₂/Reduced Graphene Oxide Anode and BCN Nanosheet Cathode

Electrolytes for Dual‐Carbon Batteries

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Pseudocapacitance contribution in boron-doped graphite sheets for anion storage enables high-performance sodium-ion capacitors

Abstract: The high pseudocapacitance contribution in boron-doped graphite sheets for anion storage is demonstrated, and then utilized to fabricate Na-ion hybrid capacitors.

Cited by 125 publications

References 73 publications

All‐Cellulose‐Based Quasi‐Solid‐State Sodium‐Ion Hybrid Capacitors Enabled by Structural Hierarchy

All‐Cellulose‐Based Quasi‐Solid‐State Sodium‐Ion Hybrid Capacitors Enabled by Structural Hierarchy

High‐Energy Density Li‐Ion Capacitor with Layered SnS2/Reduced Graphene Oxide Anode and BCN Nanosheet Cathode

Electrolytes for Dual‐Carbon Batteries

Contact Info

Product

Resources

About

High‐Energy Density Li‐Ion Capacitor with Layered SnS₂/Reduced Graphene Oxide Anode and BCN Nanosheet Cathode