Polymer‐Templated Mesoporous Li4Ti5O12 as a High‐Rate and Long‐Life Anode Material for Rechargeable Li‐Ion Batteries
作者： Junpei Yue , Christian Suchomski , Torsten Brezesinski , Bernd M. Smarsly
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摘要: The synthesis, characterization and Li-storage properties of cubic mesostructured lithium titanate spinel (Li4Ti5O12) with uniform pores diameter ≤15 nm sub-10 nm grains is reported. material was prepared in powder form by sol–gel co-assembly through a soft-templating method using poly(isobutylene)-block-poly(ethylene oxide) diblock copolymer structure-directing agent. Electron microscopy demonstrates the mesoporous nature; BET surface area around 100 m2 g−1. Rietveld analysis XRD data results from XPS, FTIR Raman spectroscopy indicate large sensitivity phase composition to variations heating rate temperature. Mesoporous Li4Ti5O12 obtained after 600 °C at 10 °C min−1 virtually single phase, minor traces Li2CO3 accumulated on surface. Half-cells Li metal anode display superior cycling (5 % capacity decay between fifth 300th cycles C/2) performance (>100 mA h g 10C).
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