Morphology control of CoCO3 crystals and their conversion to mesoporous Co3O4 for alkaline rechargeable batteries application

Du, Haiyan; Jiao, Lifang; Wang, Qinghong; Huan, Qingna; Guo, Lihui; Si, Yuchang; Wang, Yijing; Yuan, Huatang

doi:10.1039/c3ce40722e

Cited by 56 publications

(41 citation statements)

References 54 publications

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“…S1a), and finally to 3D CC microcubes with few tens of micrometer in diameter (CC/GA-3, Fig. Similar investigations of shape control by changing the urea content have been reported for other transition metal compounds, such as NiO, 35 Co 3 O 4 36 and Fe 2 O 3 . The change in morphology into a more compact structure and the larger active particle size led to much reduced surface areas (Table 1), with potentially weaker interfacial contacts and possible detachment of the active materials from the graphene matrix (Fig.…”

Section: Resultssupporting

confidence: 73%

Controlled synthesis of cobalt carbonate/graphene composites with excellent supercapacitive performance and pseudocapacitive characteristics

et al. 2015

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Cobalt carbonate hydroxide/graphene aerogel and cobalt carbonate/graphene aerogel (CCH/GA and CC/GA) composites are synthesized as supercapacitor electrodes via a one-pot hydrothermal method. Optimized processing conditions are established by controlling the composite composition and microstructure, and their influences on capacitance performance of the electrodes are identified. A remarkable specific capacitance of 1134 F g -1 at a current density of 1 A g -1 is obtained for the optimal nanowire-shaped CCH/GA electrode, which is among the highest capacitance of cobalt compound electrodes with or without nanocarbons reported so far. The electrode also delivers exceptional rate performance and cyclic stability benefiting from the pseudocapacitive characteristics of CC-based active material and the highly conductive, interconnected 3D-structured GA. The CC/GA electrode presents a high capacity of 731 F g -1 under the same condition. The ex situ XPS analysis identifies the reversible redox reactions of cobalt cations during charge/discharge cycles as the electrochemical mechanism responsible for the high pseudocapacitive properties of CC-based electrodes.

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Section: Resultssupporting

confidence: 73%

Controlled synthesis of cobalt carbonate/graphene composites with excellent supercapacitive performance and pseudocapacitive characteristics

et al. 2015

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“…1d). In the absence of AA, the thermal behavior of CoCO 3 rhombohedra reproducibly presents an initial weight loss of 1.0% around 292 C which can be assigned to the presence of a small amount of basic cobalt carbonate commonly resulting from the alkaline aqueous media [10,36], while the big weight loss (~29.2%) around 428 C accurately corresponds to the transformations of CoCO 3 to Co 3 O 4 under air atmosphere (blue curves in Fig. 1d; Fig.…”

Section: Resultsmentioning

confidence: 84%

Cobalt carbonate dumbbells for high-capacity lithium storage: A slight doping of ascorbic acid and an enhancement in electrochemical performances

Zhao

Wei

et al. 2015

Journal of Power Sources

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“…and transition metal oxides (TMOs), which manifest intrinsically enhanced safety and high electrochemical activity originating from reversible conversion reactions, are promising candidates of LIBs anode materials . Especially, compared with TMOs, TMCs usually show higher theoretical capacities owing to the facilitated multistep redox reactions of C 4+ in CO 3 2− under the catalysis of freshly generated metal nanoparticles together with the polyvalence‐state electrochemical reaction of the transition metal ions (e.g., CoCO 3 + 2Li + + 2e − ↔ Li 2 CO 3 + Co; Li 2 CO 3 + 5Li + + 5e − ↔ 0.5Li 2 C 2 + 3Li 2 O) . Moreover, because TMCs are often employed as precursors of TMOs, developing TMC electrodes can lower the production cost and increase the preparation efficiency to realize straightforward scaling up.…”

Section: Introductionmentioning

confidence: 99%

Single‐Phase Mixed Transition Metal Carbonate Encapsulated by Graphene: Facile Synthesis and Improved Lithium Storage Properties

Zhang

Huang

Wang

et al. 2018

Adv Funct Materials

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Transition metal carbonates (TMCs) with complex composition and robust hybrid structure hold great potential as high-performance electrode materials for lithium-ion batteries (LIBs). However, poor ionic/electronic conductivities and large volume changes of TMCs during lithiation/delithiation processes have hindered their applications. Herein, single-phase MnCo mixed carbonate composites encapsulated by reduced graphene oxide (Mn x Co 1−x CO 3 / RGO), in which Mn and Co species are distributed randomly in one crystal structure, are successfully synthesized through a facial liquid-state method. When evaluated as LIB anodes, the Mn x Co 1−x CO 3 /RGO composites exhibit enhanced electrochemical performance compared with the reference CoCO 3 / RGO and MnCO 3 /RGO. Specifically, the Mn 0.7 Co 0.3 CO 3 /RGO delivers an ultrahigh capacity of 1454 mA h g −1 after 130 cycles at 100 mA g −1 and exhibits an ultralong cycling stability (901 mA h g −1 after 1500 cycles at 2000 mA g −1 ). This is the best lithium storage performance among carbonatebased anodes reported up to date. Such superb performance is attributed to the hybrid structure and enhanced electroconductivity due to the integration of Co and Mn into one crystal structure, which is complemented by electrochemical impedance spectroscopy and density functional theory calculations. The facile synthesis, promising electrochemical results, and scientific understanding of the Mn x Co 1−x CO 3 /RGO provides a design principle and encourages more research on TMCs-based electrodes.

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Morphology control of CoCO3 crystals and their conversion to mesoporous Co3O4 for alkaline rechargeable batteries application

Cited by 56 publications

References 54 publications

Controlled synthesis of cobalt carbonate/graphene composites with excellent supercapacitive performance and pseudocapacitive characteristics

Controlled synthesis of cobalt carbonate/graphene composites with excellent supercapacitive performance and pseudocapacitive characteristics

Cobalt carbonate dumbbells for high-capacity lithium storage: A slight doping of ascorbic acid and an enhancement in electrochemical performances

Single‐Phase Mixed Transition Metal Carbonate Encapsulated by Graphene: Facile Synthesis and Improved Lithium Storage Properties

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