Mesoporous ZnO nanosheets for lithium ion batteries

Huang, Xiaohua; Guo, Ruochen; Wu, Jianbo; Zhang, P.

doi:10.1016/j.matlet.2014.02.012

Cited by 78 publications

(34 citation statements)

References 17 publications

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“…This result is consistent with that of the conductivity tests. In the first discharge curve, a very obvious long plateau located at about 0.5 V is observed, which is in agreement with previous works [12,13]. Moreover, the observed charge capacity in the first charge curve is relatively higher than the reported results [8,18] and is closer to the theoretical value (410 mA·h·g −1 ) of ZnO when LiZn composites are formed.…”

Section: Introductionsupporting

confidence: 91%

Effect of aluminium doping amount on the electrochemical properties of ZnO nanoparticles as anode for lithium ion batteries

Zhang

Liu

et al. 2015

Micro & Nano Letters

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Aluminium (Al)-doped ZnO nanoparticles (NPs) have been synthesised by a simple solvothermal method at low temperature. The electrochemical properties of the obtained products as anode for lithium ion batteries were examined through galvanostatic dischargecharge, cyclic voltammetry and electrochemical impedance spectroscopy measurements. The results show that the reversible capacities of Al-doped ZnO NPs are higher than the capacities of pure ZnO synthesised under the same experimental conditions. ZnO NPs doped with 2% (molar ratio) of Al show the best electrochemical properties with reversible specific capacities of 418 mA·h·g −1 at a current density of 50 mA·g −1 . The enhanced electrochemical performance of this material could be attributed to the improved electronic conductivity because of the doping of Al 3+ at an appropriate concentration.1. Introduction: Rechargeable lithium ion batteries (LIBs) have been widely utilised as power sources for portable electric devices and electric vehicles because of their relatively high energy density [1][2][3]. In principle, the electrochemical performances of LIBs depend strongly on the materials used for the anode, cathode and the electrolyte. As conventional anode materials, graphite and related materials exhibit stable electrochemical properties, but the relatively low specific capacity (∼372 mA·h·g −1 ) and poor rate capability limit their applications in high power LIBs [4]. Thus, the exploitation of new LIB anode materials with enhanced electrochemical performances has attracted extensive attention.Metal oxides show great potential as the anode in LIBs with high specific capacities [5][6][7]. Among these materials, ZnO is one of the most promising candidates because of its compatible theoretical capacity [8], low cost and environmental benignity [9]. However, so far, ZnO has rarely been used in LIBs because of its low electronic conductivity and large volume change during the process of insertion/extraction of lithium ions [10,11]. To overcome these problems, the effects of the morphology and size of ZnO particles on their electrical properties have been systematically studied [12,13]. Alternatively, it was found that the electrical and electrochemical behaviours of ZnO can be improved via doping hetero-elements [14]. It has been demonstrated that the electrical conductivity of ZnO can be significantly improved through doping the heteroelements such as aluminium, gallium and indium [15][16][17]. On the basis of these results, we reasoned that Al-doped ZnO nanoparticles (NPs) should be a suitable candidate for anode materials in LIBs.In the work reported in this Letter, Al-doped ZnO NPs were synthesised using a simple solvothermal method at low temperature. The composition and morphology of the as-synthesised Al-doped ZnO NPs were systematically characterised. The electrochemical properties of Al-doped ZnO NPs as the anode for LIBs have been elaborated and it was found that the ion capacity of Al-doped ZnO NPs is much higher than that of pure ZnO NPs.

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Section: Introductionsupporting

confidence: 91%

Effect of aluminium doping amount on the electrochemical properties of ZnO nanoparticles as anode for lithium ion batteries

Zhang

Liu

et al. 2015

Micro & Nano Letters

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“…The good cycling behaviors of the ZZFO and ZFO SMCs should be partially ascribed to their hierarchical porous SMC structures, which ensure the presence of the additional free volume to alleviate the structural strain associated with repeated Li + insertion/extraction processes. [2][3][4]19 ] As established well before, [ 14,21,49,50 ] the ZnO itself is the electrochemically active anode for Li + storage, however, it seriously suffers from its poor cycling performance owing to its poor conductivity and severe pulverization, and commonly turns out to be electrochemically inactive after several cycles. Thus, as for the ZZFO anode here, it is worth mentioning that one thing must not be overlooked that the signifi cant roles played by the homogeneously dispersed ZnO phase in the enhanced cycling behavior of the hybrid ZZFO SMCs, taking its outstanding cycling performance, even better than the single ZFO anode (see Figure 7 ), into account.…”

Section: Electrochemical Performance Of Hierarchical Mesoporous Zzfo mentioning

confidence: 90%

Self‐Sacrifice Template Fabrication of Hierarchical Mesoporous Bi‐Component‐Active ZnO/ZnFe₂O₄ Sub‐Microcubes as Superior Anode Towards High‐Performance Lithium‐Ion Battery

Hou

Lian

Zhang

et al. 2014

Adv Funct Materials

335

206

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In the work, a facile yet effi cient self-sacrifi ce strategy is smartly developed to scalably fabricate hierarchical mesoporous bi-component-active ZnO/ ZnFe 2 O 4 (ZZFO) sub-microcubes (SMCs) by calcination of single-resource Prussian blue analogue of Zn 3 [Fe(CN) 6 ] 2 cubes. The hybrid ZZFO SCMs are homogeneously constructed from well-dispersed nanocrstalline ZnO and ZnFe 2 O 4 (ZFO) subunites at the nanoscale. After selectively etching of ZnO nanodomains from the hybrid, porously assembled ZFO SMCs with integrate architecture are obtained accordingly. When evaluated as anodes for LIBs, both hybrid ZZFO and ZFO samples exhibit appealing electrochemical performance. However, the as-synthesized ZZFO SMCs demonstrate even better electrochemical Li-storage performance, including even larger initial discharge capacity and reversible capacity, higher rate behavior and better cycling performance, particularly at high rates, compared with the single ZFO, which should be attributed to its unique microstructure characteristics and striking synergistic effect between the bi-component-active, well-dispersed ZnO and ZFO nanophases. Of great signifi cance, light is shed upon the insights into the correlation between the electrochemical Li-storage property and the structure/component of the hybrid ZZFO SMCs, thus, it is strongly envisioned that the elegant design concept of the hybrid holds great promise for the effi cient synthesis of advanced yet low-cost anodes for next-generation rechargeable Li-ion batteries.

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“…ZnO has a theoretical capacity of 978 mA h/g [4]. The pure ZnO electrodes exhibit a severe capacity fade and bad cycling performance because of low electronic conductivity and large volume changes during lithium insertion-extraction processes [5]. The special 3D flower-like ZnO has been paid much attention in recent years [6,7].…”

Section: Introductionmentioning

confidence: 99%

Graphene supported ZnO/CuO flowers composites as anode materials for lithium ion batteries

Chen

Zhang

et al. 2015

Materials Letters

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Mesoporous ZnO nanosheets for lithium ion batteries

Cited by 78 publications

References 17 publications

Effect of aluminium doping amount on the electrochemical properties of ZnO nanoparticles as anode for lithium ion batteries

Effect of aluminium doping amount on the electrochemical properties of ZnO nanoparticles as anode for lithium ion batteries

Self‐Sacrifice Template Fabrication of Hierarchical Mesoporous Bi‐Component‐Active ZnO/ZnFe₂O₄ Sub‐Microcubes as Superior Anode Towards High‐Performance Lithium‐Ion Battery

Graphene supported ZnO/CuO flowers composites as anode materials for lithium ion batteries

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Mesoporous ZnO nanosheets for lithium ion batteries

Cited by 78 publications

References 17 publications

Effect of aluminium doping amount on the electrochemical properties of ZnO nanoparticles as anode for lithium ion batteries

Effect of aluminium doping amount on the electrochemical properties of ZnO nanoparticles as anode for lithium ion batteries

Self‐Sacrifice Template Fabrication of Hierarchical Mesoporous Bi‐Component‐Active ZnO/ZnFe2O4 Sub‐Microcubes as Superior Anode Towards High‐Performance Lithium‐Ion Battery

Graphene supported ZnO/CuO flowers composites as anode materials for lithium ion batteries

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Self‐Sacrifice Template Fabrication of Hierarchical Mesoporous Bi‐Component‐Active ZnO/ZnFe₂O₄ Sub‐Microcubes as Superior Anode Towards High‐Performance Lithium‐Ion Battery