The amorphous structure of nanometric amorphous iron o xide of bacterial origin and its potential use as Li-ion battery electrodes.

研究了铁氧化细菌产生的铁氧化物的结构特征和电化学性质。该材料具有独特的纳米和微米结构：该结构主要由3-nm的纳米颗粒组成，这些初级颗粒温和地聚集形成数十纳米的次级颗粒，这些次级颗粒最终聚集形成直径约1μm的微管。这种天然纳米氧化铁具有非常大的容量和优异的循环性能和倍率性能，可用于锂离子电池电极。

We investigated structural features and electrochemical properties of iron oxide produced by iron-oxidizing bacteria. This material has a unique nano-and micro-architectural structure : the structure is primarily composed of 3-nm-nanoparticles and these primary particles are mildly aggregated to form secondary particles with several tens of nanometer and these secondary particles are finally aggregated to form microtubules~ 1μm in diameter. This natural nanometric iron oxide has a very large capacity and excellent cyclability and rate capability for Li-ion battery electrode.