Synthesis of MnO/C/NiO-Doped Porous Multiphasic Composites for Lithium-Ion Batteries by Biomineralized Mn Oxides from Engineered Pseudomonas putida Cells.
Synthesis of MnO/C/NiO-Doped Porous Multiphasic Composites for Lithium-Ion Batteries by Biomineralized Mn Oxides from Engineered Pseudomonas putida Cells.
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利用来自工程恶臭假单胞菌细胞的生物矿化氧化锰合成用于锂离子电池的 MnO/C/NiO 掺杂多孔多相复合材料。
DOI：
10.3390/nano11020361
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发表时间：
2021-02-01
期刊：
影响因子：
--
通讯作者：
Li L
中科院分区：
文献类型：
--
作者：
Liu J;Gu T;Li L;Li L
基于细菌细胞表面展示技术和生物锰氧化物矿化过程，开发了一种生物模板阳离子掺入法制备锰基多相复合材料作为锂离子电池负极材料。具有表面固定化多铜氧化酶的工程化恶臭假单胞菌MB 285细胞在锰氧化物生物矿化过程中充当成核中心，并且锰氧化物在该过程中充当用于并入Ni离子以形成聚集体的沉降器。通过X射线光电子能谱、相组成和精细结构分析，证实了所制备的MnO/C/NiO（CMB-Ni）是一种具有球形和多孔纳米结构的多孔多相复合材料。NiO的存在改善了材料的电化学性能。CMB-Ni的可逆放电容量在0.1 A g-1电流密度下循环200次后保持在352.92 mAh g-1。特别地，CMB-Ni的库仑效率在第二次循环后为约100%。
A biotemplated cation-incoporating method based on bacterial cell-surface display technology and biogenic Mn oxide mineralization process was developed to fabricate Mn-based multiphasic composites as anodes for Li-ion batteries. The engineered Pseudomonas putida MB285 cells with surface-immobilized multicopper oxidase serve as nucleation centers in the Mn oxide biomineralization process, and the Mn oxides act as a settler for incorporating Ni ions to form aggregates in this process. The assays using X-ray photoelectron spectroscopy, phase compositions, and fine structures verified that the resulting material MnO/C/NiO (CMB-Ni) was porous multiphasic composites with spherical and porous nanostructures. The electrochemical properties of materials were improved in the presence of NiO. The reversible discharge capacity of CMB-Ni remained at 352.92 mAh g−1 after 200 cycles at 0.1 A g−1 current density. In particular, the coulombic efficiency was approximately 100% after the second cycle for CMB-Ni.
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