Chainlike structures assembled by Co hierarchitectures: synthesis and electrochemical properties as negative materials for alkaline secondary batteries

Wang, Qinghong; Jiao, Lifang; Du, Haiyan; Huan, Qingna; Wu, Peng; Song, Dawei; Wang, Yijing; Yuan, Huatang

doi:10.1039/c1jm11626f

Cited by 17 publications

(20 citation statements)

References 42 publications

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“…[16][17][18]47 Co-S alloys with different component, structure and morphology were also synthesized. 48 Among all kinds of Co-S alloys, Co 9 S 8 fabricated by ball milling method exhibited preferable performance. However, the discharge capacity and cycle stability of electrode need to be further improved.…”

Section: Discharge Capacity and Cyclic Stabilitymentioning

confidence: 99%

Preparation and electrochemical hydrogen storage properties of Co ₉ S ₈ alloy coated with cobalt/graphene composite

Liu

Chen

et al. 2020

Int J Energy Res

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A facile one-pot reduction process is used to obtain the cobalt/graphene composite (CoRGO). The CoRGO materials exhibit unique reticular globular morphology. Co 9 S 8 hydrogen storage alloy is fabricated via mechanical alloying method. Different amounts of CoRGO are coated on the surface of Co 9 S 8 alloy by ball milling. The electrochemical characterizations of the composites are conducted in the standard tri-electrode system. Ultimately, the CoRGO coated Co 9 S 8 electrode shows preferable performance than the RGO modified alloy (603.6 mAh/g) and original alloy (577.3 mAh/g). As the additive content of CoRGO is 6 wt%, a maximum discharge capacity of 637.5 mAh/g is obtained. Furthermore, the cycle stability and high-rate dischargeability of the electrode are also enhanced. The Co particles in the CoRGO participate in the reversible redox reactions and the graphene provides high conductivity. The CoRGO with distinctive structure and morphology can not only improve the electrocatalytic activity but also increase the specific surface area of Co 9 S 8 alloy. The cobalt and graphene species in the CoRGO composite serve a synergistic effect in further facilitating the hydrogen diffusion, expediting the charge transfer in/on the alloy and improving the corrosion resistance, thus enhancing the electrochemical performance and reaction kinetics of Co 9 S 8 alloy.

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Section: Discharge Capacity and Cyclic Stabilitymentioning

confidence: 99%

Preparation and electrochemical hydrogen storage properties of Co ₉ S ₈ alloy coated with cobalt/graphene composite

Liu

Chen

et al. 2020

Int J Energy Res

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“…In this section, the strategies that have been used to enhance the electrochemical performances for Co‐based anode materials, including the structural design or/and electronic conductivity improvements with carbon materials, are reviewed. For example, a chainlike Co hierarchical anode exhibited a high reversible discharge capacity of ≈560 mAh g −1 . With the length well controlled, 1D porous Co 3 O 4 nanowires displayed a maximum discharge capacity of 450.1 mAh g −1 and a capacity retention of 90.4% after 100 cycles .…”

Section: Rational Design Of Anode Materialsmentioning

confidence: 99%

Recent Advances in Rational Electrode Designs for High‐Performance Alkaline Rechargeable Batteries

Huang

Niu

et al. 2019

Adv Funct Materials

163

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In recent years, noticeable progress is achieved regarding alkaline rechargeable batteries (ARBs). Due to their merits of safety and low cost, ARBs are considered promising energy storage sources for large-scale grid energy storage, electric vehicles, and hybrid electric vehicles, as well as wearable and portable devices. While previous reviews have focused on specific topics associated with ARBs, providing a comprehensive review on rechargeable alkaline batteries is both timely and worthwhile. In this review, the recent progress in ARBs is summarized and the strategies underlying rational electrode designs for cathodes and anodes are highlighted, as well as their applications in full cells including flexible batteries. This review may pave the way for further designs of high-performance alkaline batteries. and a LiMn 2 O 4 cathode in 1994. [10] However, the electrolyzation of H 2 O limits the operating voltage window of ARABs, which are stable within ≈1.23 V. Furthermore, the electrode materials should be selected so that they avoid the electrolysis of H 2 O and maintain chemical stability in H 2 O. [3a] However, the preferred LIB cathodes, such as LiCoO 2 , LiMn 2 O 4 , and LiFePO 4 , which display a reversible capacity of 140, [11] 120, [12] and 170 mAh g −1 , [13] respectively, exhibit narrow working potentials and high stability in aqueous solutions but can take part in one-electron reactions at most. In addition, promising anode materials, such as VO 2 , [14] V 2 O 5 , [15] and H 2 V 3 O 8 , [16] possess the theoretical capacity or show the highest reversible capacity of only 161.6, 200, and 234 mAh g −1 , respectively, [3a] thereby leading to a full cell with a low energy density under the limited operating voltage window in aqueous electrolytes. Although the so-called "water-in-salt" electrolyte and its many variations can enable aqueous batteries with an electrochemical stability window of >3.0 V and an energy density of 200 Wh kg −1 , respectively, the ultrahighly concentrated electrolyte makes the cost too high for practical applications. [17] Since the early 20th century, alkaline rechargeable batteries (ARBs) based on nickel-iron (Ni-Fe) and nickel-cadmium (Ni-Cd) have been established and developed by Jüngner and Edison. [18] These batteries, which use alkaline solution as electrolytes, undergo an entirely different storage mechanism from ARABs and involve H + insertion/extraction and conversion processes from the alkali-metal ion insertion/extraction. Take the reaction mechanism of Ni-Fe batteries as an example

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“…In fact, the electrochemical reaction is based on the multi-electron redox reaction [12]. For instance, Co-based alloys as anodes in alkaline secondary batteries are primarily ascribed to the redox between Co and Co(OH) 2 [13][14][15][16][17][18][19]. Wang et al first reported that the Co-B alloy prepared via a chemical reduction method in an aqueous solution from bivalent cobalt sulfate has a reversible discharge capacity exceeding 300 mAh/g at 100 mA/g in an aqueous KOH solution [9], very close to those of conventional hydrogen storage alloys.…”

Section: Introductionmentioning

confidence: 99%

The Co-B Amorphous Alloy: A High Capacity Anode Material for an Alkaline Rechargeable Battery

Qiu

Huang

Chu

et al. 2016

Metals

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Abstract:The Co-B amorphous alloys were prepared via a chemical reduction method by sodium borohydride, using three different cobalt salts (CoCl 2 ·6H 2 O, CoSO 4 ·7H 2 O, and Co(NO 3 ) 2 ·6H 2 O) as sources of cobalt. As anode materials in alkaline rechargeable batteries, the Co-B alloy prepared from CoCl 2 ·6H 2 O has a maximum specific discharge capacity of 844.6 mAh/g, and 306.4 mAh/g is retained even after 100 cycles at a discharge current of 100 mA/g. When Co(NO 3 ) 2 ·6H 2 O is used as a raw material, the formation of Co 3 (BO 3 ) 2 worsens the electrochemical properties of the sample, i.e., a maximum capacity of only 367.0 mAh/g.

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Chainlike structures assembled by Co hierarchitectures: synthesis and electrochemical properties as negative materials for alkaline secondary batteries

Cited by 17 publications

References 42 publications

Preparation and electrochemical hydrogen storage properties of Co ₉ S ₈ alloy coated with cobalt/graphene composite

Preparation and electrochemical hydrogen storage properties of Co ₉ S ₈ alloy coated with cobalt/graphene composite

Recent Advances in Rational Electrode Designs for High‐Performance Alkaline Rechargeable Batteries

The Co-B Amorphous Alloy: A High Capacity Anode Material for an Alkaline Rechargeable Battery

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Chainlike structures assembled by Co hierarchitectures: synthesis and electrochemical properties as negative materials for alkaline secondary batteries

Cited by 17 publications

References 42 publications

Preparation and electrochemical hydrogen storage properties of Co 9 S 8 alloy coated with cobalt/graphene composite

Preparation and electrochemical hydrogen storage properties of Co 9 S 8 alloy coated with cobalt/graphene composite

Recent Advances in Rational Electrode Designs for High‐Performance Alkaline Rechargeable Batteries

The Co-B Amorphous Alloy: A High Capacity Anode Material for an Alkaline Rechargeable Battery

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Preparation and electrochemical hydrogen storage properties of Co ₉ S ₈ alloy coated with cobalt/graphene composite

Preparation and electrochemical hydrogen storage properties of Co ₉ S ₈ alloy coated with cobalt/graphene composite