Graphite-coated ZnO nanosheets as high-capacity, highly stable, and binder-free anodes for lithium-ion batteries

Quartarone, Eliana; Dall'Asta, Valentina; Resmini, Alessandro; Tealdi, Cristina; Tredici, Ilenia G.; Tamburini, Umberto Anselmi; Mustarelli, Piercarlo

doi:10.1016/j.jpowsour.2016.04.107

Cited by 75 publications

(50 citation statements)

References 29 publications

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“…In the following cycles, the peak shifts to higher potential (0.71 V) and this behavior is common in metal oxide‐based anodes . In the first anodic curve, three weak anodic peaks (indicated by three black arrows) around 0.24, 0.53, and 0.75 V are ascribed to the multistep dealloying reactions of Li x Zn alloys to form Zn nanocrystals, and the big and broad oxidation peak located at 1.35 V results from the reconversion reaction between Zn nanocrystals and Li 2 O to regenerate ZnO . Pure metal Mn is electrochemical inactive to Li + ions and cannot react with Li + ions during cycling to contribute to reversible capacity .…”

Section: Resultsmentioning

confidence: 91%

Dual Electrostatic Assembly of Graphene Encapsulated Nanosheet‐Assembled ZnO‐Mn‐C Hollow Microspheres as a Lithium Ion Battery Anode

Xie

Liu

Zeng

et al. 2018

Adv Funct Materials

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Graphene encapsulated nanosheet-assembled ZnO-Mn-C hierarchical hollow microspheres are produced through a simple yet effective dual electrostatic assembly strategy, followed by a heating treatment in inert atmosphere. The modification of graphene sheets, metal Mn, and in situ carbon leads to form 3D interconnected conductive framework as electron highways. The hollow structure and the open configuration of hierarchical microspheres guarantee good structural stability and rapid ionic transport. More importantly, according to the density functional theory calculations, the oxygen vacancies in the hierarchical microspheres would cause an imbalanced charge distribution and thus the formation of local in-plane electric fields around oxygen vacancy sites, which is beneficial for the ionic/electronic transport during cycling. Due to this multiscale coordinated design, the as-fabricated graphene encapsulated nanosheet-assembled ZnO-Mn-C hierarchical hollow microspheres demonstrate good lithium storage properties in terms of high reversible capacity (1094 mA h g −1 at 100 mA g −1 ), outstanding high-rate long-term cycling stability (843 mA h g −1 after 1000 cycles at 2000 mA g −1 ), and remarkable rate capability (422 mA h g −1 after total 1600 cycles at 5000 mA g −1 ).

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Section: Resultsmentioning

confidence: 91%

Dual Electrostatic Assembly of Graphene Encapsulated Nanosheet‐Assembled ZnO‐Mn‐C Hollow Microspheres as a Lithium Ion Battery Anode

Xie

Liu

Zeng

et al. 2018

Adv Funct Materials

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“…The initial cathodic scan shows an intense peak at 0.43 V that corresponds to the decomposition of the electrolyte and the formation of a solid–electrolyte interface (SEI) layer, which led to the irreversible capacity and weakened significantly in subsequent cycles . The peak at 0.6–0.9 V may originate from the reduction of ZnO to Zn and the formation of the Li x Zn y alloy . Another relatively weak peak below 0.1 V is caused by the intercalation of Li + into the carbon as reported previously .…”

Section: Resultsmentioning

confidence: 99%

“…In addition, several adjacent oxidation peaks below 0.75 V may be assigned to the multiple delithiation reactions of a lithium–zinc alloy and the decomposition of the SEI layer . A broad peak near 1.25 V arises from the reaction between Zn and Li 2 O to form ZnO . The curves are generally quite similar to each other except the first one, which indicates the reversible reaction kinetics and stability of the Li storage capacity of the ZnO/C‐160 °C electrode.…”

Section: Resultsmentioning

confidence: 99%

Continuous Carbon Hollow Shell with Zinc Oxide Nanoparticles Embedded as an Anode Material with Excellent Lithium Storage Capability

Mao

Wang

et al. 2017

Energy Tech

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Continuous carbon hollow shells with embedded ZnO nanoparticles were synthesized from colloidal polystyrene/ZnO as templates and glucose oligomer as the carbon source followed by calcination. The resulting uniform ZnO/C hollow spheres display a relatively high reversible capacity of 994 mAh g−1 after 100 cycles at 0.1 A g−1 and 812 mAh g−1 after 200 cycles at 1 A g−1, which is superior to most reported ZnO‐based anode materials. The excellent electrochemical performance of the ZnO/C hollow spheres may arise from the following aspects: the shortened pathway of Li ions and electrolyte attributed to the unique hollow shell structures, improved electronic conductivity, firm encapsulation of ZnO nanoparticles, and high specific surface area of the products, which together facilitate the ZnO nanoparticles to undergo the alloying reaction completely.

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“…An alloying reaction of Zn with Li is a multi-step process including following steps (Equation 3) [18,19]:…”

Section: Introductionmentioning

confidence: 99%

High-Yield Preparation of ZnO Nanoparticles on Exfoliated Graphite as Anode Material for Lithium Ion Batteries and the Effect of Particle Size as well as of Conductivity on the Electrochemical Performance of Such Composites

Isakin

Hiltl²,

Struck³

et al. 2018

Batteries

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Graphite-coated ZnO nanosheets as high-capacity, highly stable, and binder-free anodes for lithium-ion batteries

Cited by 75 publications

References 29 publications

Dual Electrostatic Assembly of Graphene Encapsulated Nanosheet‐Assembled ZnO‐Mn‐C Hollow Microspheres as a Lithium Ion Battery Anode

Dual Electrostatic Assembly of Graphene Encapsulated Nanosheet‐Assembled ZnO‐Mn‐C Hollow Microspheres as a Lithium Ion Battery Anode

Continuous Carbon Hollow Shell with Zinc Oxide Nanoparticles Embedded as an Anode Material with Excellent Lithium Storage Capability

High-Yield Preparation of ZnO Nanoparticles on Exfoliated Graphite as Anode Material for Lithium Ion Batteries and the Effect of Particle Size as well as of Conductivity on the Electrochemical Performance of Such Composites

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