Manipulating Molecular Structure and Morphology to Invoke High‐Performance Sodium Storage of Copper Phosphide

Abstract

Copper is used as current collector in rechargeable ion batteries due to its outstanding electronic conductivity and low cost. The intrinsic inactivity of copper, however, makes it a poor candidate for an electrode material without further structural modification. To fully utilize its high electronic conductivity, herein, the incorporation of heterogeneous phosphorus combined with building a unique 3D hollow structure is proposed. The as‐prepared copper phosphide hollow nanocubes deliver a stable capacity of 325 mAh·g−1 at 50 mA·g−1 and fast charging and discharging via pseudocapacitance behavior. The outstanding electrochemical performance is attributed to the synergetic effects of high electronic conductivity of copper and the high sodium storage capability of phosphorus. In addition, this facile synthesis method is also easily scaled up for practical applications. Thus, copper phosphide is a promising anode material for sodium ion batteries.

Mesocrystallizing Nanograins for Enhanced Li+ Storage

“…DOI: 10.1002/aenm.202100503 mechanisms, for instance, alloying, conversion, and intercalation. [3][4][5][6][7][8][9][10] Nevertheless, as a result of the tightly packed crystallographic structure of these materials, the storage of Li + inevitably results in large volume expansion during battery cycling. Along with the research of nanomaterials, the size reduction of electrode particles has been widely used to improve the storage capacity of Li + .…”

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“…S11a †). 51 This surface electrochemical oxidation process was also conrmed by the P 2p XPS spectrum (Fig. S11b †).…”

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