A high-voltage aqueous lithium ion capacitor with high energy density from an alkaline–neutral electrolyte

Li, Chunyang; Wu, Wenzhuo; Zhang, Shuaishuai; Liang, Huihui; Zhu, Yusong; Wang, Jing; Fu, Lijun; Chen, Yuhui; Wu, Yuping; Huang, Wei

doi:10.1039/c8ta11735g

Cited by 53 publications

(35 citation statements)

References 69 publications

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“…[ 42–44 ] Additionally, the performance of the energy density of TCCS NiCo 2 S 4 //Fe 1−x S/rGOA AHC outperformed that of other state‐of‐the‐art structures that combine nickel–cobalt or manganese oxide/sulfide‐based cathode and EDLC‐type carbon‐based anode electrodes [ 25,45–47 ] and led to higher energy density than those of previous aqueous lithium‐ion capacitors (Table S3, Supporting Information). [ 48–49 ] Additionally, the cycling performance of TCCS NiCo 2 S 4 //Fe 1−x S/rGOA AHC at a high‐current density of 10 A g −1 (Figure 6h) showed that 90.2% of the initial capacitance was maintained after 50 000 cycles. Furthermore, the columbic efficiency remained high (≈100%) for over 50 000 cycles.…”

Section: Resultsmentioning

confidence: 99%

Mesoporous Thorn‐Covered Core–Shell Cathode and 3D Reduced Graphene Oxide Aerogel Composite Anode with Conductive Multivalence Metal Sulfides for High‐Performance Aqueous Hybrid Capacitors

Park

Choi

Ock

et al. 2021

Advanced Energy Materials

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friendly, and safe electrochemical energy storage is growing. Conventional LIBs possess relatively high-energy density but suffer from slow charging rates owing to their low power density and short cycle stability. There are also safety hazards associated with the use of these environmentally toxic and flammable material. Moreover, these LIBs require expensive organic electrolytes to maintain the high voltages required for high-energy density. [3,4] Hence, low-cost aqueous ECs, which can operate in environmentally friendly and safe aqueous electrolytes, have been developed as candidates to overcome the aforementioned challenges of organic electrolyte-based electrochemical energy storage. Nevertheless, their low capacity and working voltage limit high-energy density for advanced use. [5,6] Aqueous hybrid capacitors (AHCs) present a promising alternative as electrochemical energy storage systems and can be designed as asymmetric full-cells using the different potential windows of anode and cathode reactions for high-energy density. [7-9] Earth-abundant metal oxides are promising materials for atom-by-ion reactions, but their low conductivity limits full capacitance, resulting in a slow charging rate and poor cycle stability. [10-12] This suggests that conductive metal sulfides are suitable electrode materials for a fast charging rate and long-life cycle stability. [6,13-15] Moreover, the synthesis of cathode materials at nanometer-scale sizes is required to enlarge active surface areas for high capacity and to shorten diffusion lengths for fast ion transfer; however, the random dense packing and agglomeration in electrodes lead to low tap density and capacity fading during repeated charge-discharge cycles. [16,17] Therefore, the development of a new cathode material to promote high tap density and long-life stability remains an enormous challenge. Moreover, very few materials capable of high-energy density have been synthesized as anode materials compatible with cathode materials. [18-20] Reduced graphene oxide aerogel (rGOA), which is a three-dimensional (3D) self-assembled material with rGO sheets, is a novel anode material that possesses ultra-light density, hierarchical pores for fast ion transport, and carbon networks for facile electron conduction. [18,19] However, rGOA anode gives a low capacity due to its limited active Aqueous hybrid capacitors (AHCs) are very promising electrochemical energy devices due to their being safe, cheap, and environmentally friendly, but their low energy and power densities are yet to be overcome for prolonged operation in a single fast charging device. Herein, a strategy to realize high-energy density and ultrafast rechargeable AHCs is reported. A thorn-covered core-shell conductive multivalence metal sulfide is synthesized as a cathode material that achieves high capacity via multivalence Ni and Co states and contains multiple mesoporous channels for fast ion transfer and ultrafine nanoparticles for efficient contact with electrolyte ions. Moreover, the multivalence metal stat...

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Section: Resultsmentioning

confidence: 99%

Mesoporous Thorn‐Covered Core–Shell Cathode and 3D Reduced Graphene Oxide Aerogel Composite Anode with Conductive Multivalence Metal Sulfides for High‐Performance Aqueous Hybrid Capacitors

Park

Choi

Ock

et al. 2021

Advanced Energy Materials

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“…K + ‐Conducting Membrane was prepared according to our recent works . Waste Nafion NR117 membrane (purchased from Yinfeng New Energy Co. Ltd.) was used as raw material and treated with the following three steps to prepare the K + ‐conducting membrane (DKJ‐01).…”

Section: Methodsmentioning

confidence: 99%

An Aqueous Hybrid Zinc‐Bromine Battery with High Voltage and Energy Density

Yuan

Huang

et al. 2020

ChemElectroChem

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The zinc-bromine redox flow battery (ZBB) is an ideal device of energy storage systems. Nevertheless, its energy density is relatively low compared to those of Li-ion batteries, due to its low output voltage. Herein, a high-voltage aqueous hybrid zincbromine battery system (AHZBBs) was developed, where K + -conducting membrane was used to segregate neutral-alkaline hybrid electrolytes and redox couples of Br 2 /Br À and [Zn(OH) 4 ] 2À / Zn at the positive and negative electrode. Benefited from an efficient and stable cathode catalyst (carbon-manganite nanoflakes), this AHZBB delivered a high average output voltage of 2.15 V and energy density of 276.7 Wh/kg without capacity attenuation after 200 cycles. More importantly, this work provides an efficient avenue to elevating the output voltage and energy density, and will strongly encourage studies on redox flow batteries.[a] Dr.

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“…The preparation process of Li + -conducting membrane was similar to the recent works. [60,61] Waste Nafion NR117 membrane (purchased from Yinfeng New Energy Co. Ltd.) was used as raw material and treated with the following three steps to prepare the Li + -conducting membrane. At first, wasted Nafion 117 membrane was treated with 3 wt% H 2 O 2 aqueous solution and stirred for 1 h at 80 °C in water bath.…”

Section: Materials and Methods-preparation Of LI + -Conducting Membranementioning

confidence: 99%

A Fully Aqueous Hybrid Electrolyte Rechargeable Battery with High Voltage and High Energy Density

Yuan

Zeng

et al. 2020

Advanced Energy Materials

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explored for increasing the energy density of ARBs: one is to use electrode materials with higher specific capacities and the other is to improve the output voltages of ARBs. [7-9] Applying high capacity materials, such as sulfur and zinc metal, as electrode materials can significantly improve the energy density of ARBs to an anticipated level, but the energy density of ARBs is still relatively limited for two main reasons. [10-15] First, the specific capacity of most electrode materials is not much different from that used for organic systems. [8] Second, the standard working voltage of these batteries is less than 2 V, which is restricted by the narrow electrochemical stability window of a single-phase solution. Using a cathode material with a higher potential, and a anode material with lower potential can effectively utilize the voltage window of a single electrolyte to a greater extent, [16,17] but the increment of energy density is still restricted due to the limited voltage window of a single electrolyte. Therefore, in order to fully improve the energy density of ARBs, an extended voltage window of electrolytes is highly desired to match the electrode materials with higher or lower working potential. So far, there are mainly four ways to widen the voltage stability window of aqueous electrolytes. First, an artificial solid electrolyte interface (SEI) is introduced to prevent the negative electrodes (such as Li metal, Mg metal and graphite) with extremely low working potential from contact with aqueous electrolytes directly. [18-23] This approach could promise ARBs with ultra-high voltage and ultra-high energy density, but requires dense ceramic membrane that can conduct Li + and effectively block water molecules. The synthesis of ceramic membrane is complex and its price is high. Second, the voltage stability window can be widened by using super-concentrated aqueous electrolytes, which include "'water-in-salt"' electrolytes (3.0 V), "'water-in-bisalt"' electrolytes (3.1 V) and hydrate-melt electrolytes (3.8 V), etc. [10,24-30] This method opens up a new horizon for high voltage, high energy density ARBs, but the used organic lithium salts are more expensive and less suitable for large-scale applications. [31-34] Third, the addition of additives can form an interface similar to SEI on the surface of the material, which can also effectively widen the voltage stability window of aqueous electrolyte. [35-38] Fourth, electrolytes with different pH values, mainly acid electrolytes and alkaline electrolytes, are assembled to form a hybrid electrolyte system. This method is relatively simple, and the electrolyte salt used is Aqueous rechargeable batteries (ARBs) offer advantages in terms of safety, environmental friendliness and cost over their non-aqueous counterparts. However, the narrow electrochemical stability window of water inherently limits the output voltage and energy density of ARBs. Here, a system with an aqueous hybrid electrolyte containing a Zn anode in alkaline solution and LiMn 2 O 4 cathode in neu...

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A high-voltage aqueous lithium ion capacitor with high energy density from an alkaline–neutral electrolyte

Abstract: A proof-of-concept lithium ion capacitor comprising LiMn2O4 nanorods as the cathode, a nitrogen-rich biomass carbon anode and a stable alkaline–neutral electrolyte was designed and fabricated.

Cited by 53 publications

References 69 publications

Mesoporous Thorn‐Covered Core–Shell Cathode and 3D Reduced Graphene Oxide Aerogel Composite Anode with Conductive Multivalence Metal Sulfides for High‐Performance Aqueous Hybrid Capacitors

Mesoporous Thorn‐Covered Core–Shell Cathode and 3D Reduced Graphene Oxide Aerogel Composite Anode with Conductive Multivalence Metal Sulfides for High‐Performance Aqueous Hybrid Capacitors

An Aqueous Hybrid Zinc‐Bromine Battery with High Voltage and Energy Density

A Fully Aqueous Hybrid Electrolyte Rechargeable Battery with High Voltage and High Energy Density

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