Recent Smart Methods for Achieving High‐Energy Asymmetric Supercapacitors

Huang, Yu‐Ying; Zeng, Yinxiang; Yu, Minghao; Liu, Peng; Tong, Yexiang; Cheng, Faliang; Lu, Xihong

doi:10.1002/smtd.201700230

Cited by 153 publications

(75 citation statements)

References 159 publications

(209 reference statements)

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“…[1][2][3][4][5][6][7][8] As one of the most promising energy storage devices, aqueous zinc-ion batteries (ZIBs) has gained ever-increasing attention on account of its outstanding safety, high theoretical capacity (Zn: ≈820 mAh g −1 ), low cost as well as environmental benignity. [1][2][3][4][5][6][7][8] As one of the most promising energy storage devices, aqueous zinc-ion batteries (ZIBs) has gained ever-increasing attention on account of its outstanding safety, high theoretical capacity (Zn: ≈820 mAh g −1 ), low cost as well as environmental benignity.…”

Section: Introductionmentioning

confidence: 99%

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Stabilized Molybdenum Trioxide Nanowires as Novel Ultrahigh‐Capacity Cathode for Rechargeable Zinc Ion Battery

et al. 2019

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Exploration of high‐performance cathode materials for rechargeable aqueous Zn ion batteries (ZIBs) is highly desirable. The potential of molybdenum trioxide (MoO 3 ) in other electrochemical energy storage devices has been revealed but held understudied in ZIBs. Herein, a demonstration of orthorhombic MoO 3 as an ultrahigh‐capacity cathode material in ZIBs is presented. The energy storage mechanism of the MoO 3 nanowires based on Zn 2+ intercalation/deintercalation and its electrochemical instability mechanism are particularly investigated and elucidated. The severe capacity decay of the MoO 3 nanowires during charging/discharging cycles arises from the dissolution and the structural collapse of MoO 3 in aqueous electrolyte. To this end, an effective strategy to stabilize MoO 3 nanowires by using a quasi‐solid‐state poly(vinyl alcohol)(PVA)/ZnCl 2 gel electrolyte to replace the aqueous electrolyte is developed. The capacity retention of the assembled ZIBs after 400 charge/discharge cycles at 6.0 A g −1 is significantly boosted, from 27.1% (in aqueous electrolyte) to 70.4% (in gel electrolyte). More remarkably, the stabilized quasi‐solid‐state ZIBs achieve an attracting areal capacity of 2.65 mAh cm −2 and a gravimetric capacity of 241.3 mAh g −1 at 0.4 A g −1 , outperforming most of recently reported ZIBs.

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Section: Introductionmentioning

confidence: 99%

“…[13,[34][35][36][37] In previous studies, MoO 3 has shown its reversible Li-ion insertion/extraction ability. [13,[34][35][36][37] In previous studies, MoO 3 has shown its reversible Li-ion insertion/extraction ability.…”

Section: Introductionmentioning

confidence: 99%

Stabilized Molybdenum Trioxide Nanowires as Novel Ultrahigh‐Capacity Cathode for Rechargeable Zinc Ion Battery

et al. 2019

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“…[15] Such materials are not rare, including but not limited in carbon nanotubes, graphene, activated carbon (AC), mesoporous carbon, etc. [15] Such materials are not rare, including but not limited in carbon nanotubes, graphene, activated carbon (AC), mesoporous carbon, etc.…”

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confidence: 99%

A Calcium‐Ion Hybrid Energy Storage Device with High Capacity and Long Cycling Life under Room Temperature

Yao

Song

et al. 2019

Advanced Energy Materials

106

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Aurbach et al. [5] indicated that calcium deposition was impossible in organic solutions at room temperature. Molten salt cells were demonstrated to exhibit good reversibility at high operating temperature (550-700 °C), [6] which is difficult to meet with the mainstream applications operated under room temperature. Palacín et al. [3a] achieved the deposition of calcium at 75-100 °C and proved its reversibility for over 30 cycles. Recently, using Ca(BH 4 ) 2 in tetrahydrofuran as electrolyte, Ca ions were realized plating and stripping at room temperature for 50 cycles. [7] Up till now, because of the lack of an appropriate combination of suitable electrode materials and electrolytes, [8] it is difficult to construct calcium-based energy storage devices based on the conventional rocking-chairtype mechanism.Multiion reaction mechanism is a possible approach to break Ca-technology barrier, in which anions and cations react with cathode and anode, respectively, during charge process (Figure 1). In general, supercapacitors (SCs) exhibit superior rate and cycling properties [9] and dual-ion batteries (DIBs) have displayed high capacity and working voltage. [10] Meanwhile, SCs have to stop storing charge when the potential of either electrode reaches the threshold of electrolyte, [11] which prevents SCs from fully utilizing the voltage window of electrolyte, resulting in relatively low capacity and voltage. As for DIBs, the anion intercalation/deintercalation on cathode side will destabilize the structure for the large radius of anions (TFSI − , PF − 6 , etc.), thus degrading the cycling and rate performance. [12] Recently, Tang et al. developed a reversible calcium-based DIB at room-temperature, [13] but the cycling stability (350 cycles) and rate performance (the capacity remained 55% when the current density increased from 0.1 to 0.4 A g −1 ) were far from practical applications.Herein, we reported a novel calcium-ion hybrid energy storage device (Ca-HSC) at room temperature via combining the features of SCs and DIBs (Figure 1c), in which capacitor component cathode and battery component anode served as a complementary to each other while maintaining their unique advantages. [14] In detail, the stable and low anodic potential of this device caused by Faradaic reaction allowed the cathode potential to be tested up until the upper limit of electrolyte, enabling large capacity and high voltage. Meanwhile, the non-Faradaic reaction at the cathode brought fast kinetics performance and long cycling life. After optimization, this Ca-based Ca-ion based devices are promising candidates for next-generation energy storage with high performance and low cost, thanks to its multielectrons, superior kinetics, as well as abundance (2500 times lithium). Because of the lack of an appropriate combination of suitable electrode materials and electrolytes, it is unsuccessful to attain a satisfactory performance on complete Ca-ion energy storage devices. Here, the multiion reaction strategy is defined to construct a complete Ca-ion ener...

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“…It can be easily induced into TMOs through annealing at certain temperatures in oxygen‐deficient atmosphere (vacuum, Nitrogen, Argon, etc .) or reducing atmosphere (hydrogen or ammonia) . Recently, Zhang et al .…”

Section: Recently Emerging Approaches For Surface Engineeringmentioning

confidence: 99%

Surface Engineering for Advanced Aqueous Supercapacitors: A Review

Yang

et al. 2019

ChemElectroChem

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Considerable attention has been focused on aqueous supercapacitors (SCs), owing to their large power density and excellent cycling stability, which makes them more suitable for high power applications. However, the lower energy densities (E) of aqueous SCs as compared to batteries have impeded their range of commercial applications. To overcome this challenge, intensive studies have been devoted to the topic, in which surface engineering becomes critical to the high‐performance electrode design due to the efficient manipulation of a material surface to boost energy storage while maintaining the integrity of interior of the material. The purpose of this Minireview article is to highlight recent significant breakthroughs realized through surface engineering approaches such as surface functionalization, heterostructure design, and surface charge modulation. Current challenges, emerging trends, and opportunities for advanced SCs are discussed accordingly.

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Recent Smart Methods for Achieving High‐Energy Asymmetric Supercapacitors

Cited by 153 publications

References 159 publications

Stabilized Molybdenum Trioxide Nanowires as Novel Ultrahigh‐Capacity Cathode for Rechargeable Zinc Ion Battery

Stabilized Molybdenum Trioxide Nanowires as Novel Ultrahigh‐Capacity Cathode for Rechargeable Zinc Ion Battery

A Calcium‐Ion Hybrid Energy Storage Device with High Capacity and Long Cycling Life under Room Temperature

Surface Engineering for Advanced Aqueous Supercapacitors: A Review

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