A core–shelled Sb@C nanorod cathode with a graphene aerogel interlayer for high-capacity aluminum ion batteries

Li, Tongge; Hu, Haoyu; Cai, Tonghui; Liu, Xiaoqi; Wang, Yixun; Wang, Liying; Zhang, Yu; Xing, Wei; Zhang, Yan

doi:10.1039/d2nr02755k

Cited by 6 publications

(2 citation statements)

References 33 publications

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“…According to the formula i (V)= k 1 v + k 2 v 1/2 , the contribution rates at different scanning rates can be obtained by k 1 v and k 2 v 1/2 , where k 1 v is the capacitance contribution and k 2 v 1/2 is the diffusion control contribution. As can be seen from Figure 4d, the dominant capacitance contribution increases with the increasing scanning rate [25] . The capacity contribution at different charging/discharging potentials was shown in Figure 4e.…”

Section: Resultsmentioning

confidence: 73%

“…As can be seen from Figure 4d, the dominant capacitance contribution increases with the increasing scanning rate. [25] The capacity contribution at different charging/discharging poten-tials was shown in Figure 4e. The ex-situ XRD patterns of the NVO@C composite under different charging/discharging potentials were checked (Figure 4f).…”

Section: Chemistry-a European Journalmentioning

confidence: 99%

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A Foldable Aqueous Zn‐Ion Battery with Gear‐Structured Composite as Freestanding Cathode

Liu

Zhu

Han

et al. 2023

Chemistry A European J

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A foldable battery with high flexibility provides great potential in various wearable electronic devices for health and fitness tracking, chronic disease management, performance monitoring, navigation tracking, and portable gears for soldiers. We report a highly flexible, self-healing Znion battery with a free-standing cathode that is composed of a 3D gear-like NH 4 V 4 O 10 @C composite on carbon paper. The battery retained a capacity of up to 102.4 mAh g À 1 even after being folded 60 times with a high angle of 180°. An aqueous hydrogel consisting polyvinyl alcohol, glycerin and Zn-(CF 3 SO 3 ) 2 was used as electrolyte, which showed as high as 580 % tensile strain under a loading weight of 78 N. The battery exhibited a better capacity retention of over 100 mAh g À 1 and Coulombic efficiency of over 99.8 % after cutting and twisting to 90°, thereby indicating a great selfhealing performance. The gear-like geometry greatly improved the volume accommodation due to the increased interval space between the blades and the outward configuration. Meanwhile the Zn 2 + ionic conductivity was improved by rapid re-binding of many existing hydroxy groups from the electrolyte and the enhanced contact surface area and diffusion route from the cathode material. The highly flexible, safe aqueous Zn-ion battery opens a practical way to power various carry-on electronics under mechanical agitation.

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Section: Resultsmentioning

confidence: 73%

Section: Chemistry-a European Journalmentioning

confidence: 99%

A Foldable Aqueous Zn‐Ion Battery with Gear‐Structured Composite as Freestanding Cathode

Liu

Zhu

Han

et al. 2023

Chemistry A European J

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Water‐Stabilized Vanadyl Phosphate Monohydrate Ultrathin Nanosheets toward High Voltage Al‐Ion Batteries

Zheng

Xia

et al. 2023

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storage system, which would propel the substantial development of the energy storage technology. [4] In order to design high energy density storage devices, the identifying of host materials with high performance, especially elevated work potential, is essential. Due to the high electronegativity of oxygen, the metal oxides own strong ionic chemical bonds, which consequently result in increased plateau voltages. [5] Examples of such oxides owning potential high discharge voltages are amorphous V 2 O 5 (≈0.9 V), [6] MoO 2 (1.9 V), [7] TiO 2 (≈1.0 V) [8] and so on. Despite their advantage in working potential, they usually suffer from low capacity, discontented cycling life, and inferior rate capability, which originate from the slow reaction kinetics caused by the strong Coulombic interaction between the trivalent Al 3+ and oxide host lattice. [9] Previous researches have demonstrated that water molecules can be applied as "lubricant" to facilitate ions diffusion. [10] Typically, vanadyl phosphate dihydrate (VOPO 4 •2H 2 O) with a long intercalation chemistry history, has been recently developed as a potential cathode material for various alkali metalion batteries, meriting from its high redox reaction potential due to the strong inductive effect of [PO 4 ] tetrahedrons and the large interlayer space stemming from the interlayer water molecules. [11] Moreover, the easier multivalent ions (Mg 2+ and Zn 2+ ) intercalation into VOPO 4 •2H 2 O can take place with the aid of the water molecules. [11e,12] The study of vanadyl phosphate hydrate as AIBs cathode was first reported in 2020 by Wang and co-workers via fabricating a VOPO 4 -graphene heterostructure. [11f ] Although an improved cycling performance originating from its zero-strain property is achieved, the potential high discharge plateau voltage and capacity of vanadyl phosphate hydrate are underutilized. In addition, the effect and mechanism of the bonded water molecule content and its stability on the aluminum storage behavior have not been systematically studied.In this work, we select VOPO 4 •2H 2 O as a model cathode to reveal its Al 3+ storage behaviors. As expected, the VOPO 4 •2H 2 O presents high discharge plateau and holds high potential Al 3+ storage capacity. We further investigate the relationship between water content and electrochemical performance. Interestingly, our density functional theory (DFT) calculations results reveal that, compared with VOPO 4 •2H 2 O and VOPO 4 , the VOPO 4 •H 2 O possesses the lowest Al 3+ diffusion barrier and Al ion batteries (AIBs) are attracting considerable attention owing to high volumetric capacity, low cost, and high safety. However, the strong electrostatic interaction between Al 3+ and host lattice leads to discontented cycling life and inferior rate capability. Herein, a new strategy of employing water molecules contained VOPO 4 •H 2 O to boost Al 3+ migration via the charge shielding effect of water is reported. It is revealed that VOPO 4 •H 2 O with water lubrication effect and smaller steric hindrance ...

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Stable sodium-ion battery anode enabled by encapsulating Sb nanoparticles in spherical carbon shells

Mao

Jia

Zhu

et al. 2023

J Solid State Electrochem

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A core–shelled Sb@C nanorod cathode with a graphene aerogel interlayer for high-capacity aluminum ion batteries

Abstract: Rechargeable aluminum-ion batteries, RAIBs, as a prime candidate for next-generation batteries, have attracted much attention due to the extremely high anode capacity and good safety. However, the lack of matching...

Cited by 6 publications

References 33 publications

A Foldable Aqueous Zn‐Ion Battery with Gear‐Structured Composite as Freestanding Cathode

A Foldable Aqueous Zn‐Ion Battery with Gear‐Structured Composite as Freestanding Cathode

Water‐Stabilized Vanadyl Phosphate Monohydrate Ultrathin Nanosheets toward High Voltage Al‐Ion Batteries

Stable sodium-ion battery anode enabled by encapsulating Sb nanoparticles in spherical carbon shells

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