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首页> 外文期刊>Chemistry: A European journal >Electrospun Hierarchical CaCo_2O_4 Nanofibers with Excellent Lithium Storage Properties
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Electrospun Hierarchical CaCo_2O_4 Nanofibers with Excellent Lithium Storage Properties

机译：具有优良锂存储性能的静电纺丝CaCo_2O_4纳米纤维

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摘要

Hierarchical CaCo_2O_4 nanofibers (denoted as CCO-NFs) with a unique hierarchical structure have been prepared by a facile electrospinning method and subsequent calcination in air. The as-prepared CCO-NFs are composed of well-defined ultrathin nanoplates that arrange themselves in an oriented manner to form one-dimensional (1D) hierarchical structures. The controllable formation process and possible formation mechanism are also discussed. Moreover, as a demonstration of the functional properties of such hierarchical architecture, the 1D hierarchical CCO-NFs were investigated as materials for lithium-ion batteries (LIBs) anode; they not only delivers a high reversible capacity of 650 mAhg~(-1) at a current of 100 mAg-1 and with 99.6% capacity retention over 60 cycles, but they also show excellent rate capability with respect to counterpart nanoplates-in-nanofibers and nanoplates. The high specific surface areas as well as the unique feature of hierarchical structures are probably responsible for the enhanced electrochemical performance. Considering their facile preparation and good lithium storage properties, 1D hierarchical CCO-NFs will hold promise in practical LIBs.
机译：通过一种简便的静电纺丝方法，随后在空气中煅烧，制备出具有独特层次结构的CaCa_2O_4纳米纤维（称为CCO-NFs）。所制备的CCO-NF由定义明确的超薄纳米板组成，它们以定向方式排列以形成一维（1D）分层结构。还讨论了可控的形成过程和可能的形成机理。此外，为证明这种分层体系结构的功能特性，研究了一维分层CCO-NFs作为锂离子电池（LIB）阳极的材料。它们不仅在100 mAg-1的电流下提供650 mAhg〜（-1）的高可逆容量，并且在60个循环中具有99.6％的容量保持率，而且相对于纳米纤维中的纳米板而言，它们还具有出色的速率能力和纳米板。高比表面积以及分层结构的独特特征可能是增强电化学性能的原因。考虑到它们的制备简便和良好的锂存储性能，一维分层CCO-NFs在实际的LIB中将具有希望。

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