Dataset Information

Electrochemical Li Topotactic Reaction in Layered SnP3 for Superior Li-Ion Batteries.

ABSTRACT: The development of new anode materials having high electrochemical performances and interesting reaction mechanisms is highly required to satisfy the need for long-lasting mobile electronic devices and electric vehicles. Here, we report a layer crystalline structured SnP3 and its unique electrochemical behaviors with Li. The SnP3 was simply synthesized through modification of Sn crystallography by combination with P and its potential as an anode material for LIBs was investigated. During Li insertion reaction, the SnP3 anode showed an interesting two-step electrochemical reaction mechanism comprised of a topotactic transition (0.7-2.0?V) and a conversion (0.0-2.0?V) reaction. When the SnP3-based composite electrode was tested within the topotactic reaction region (0.7-2.0?V) between SnP3 and LixSnP3 (x???4), it showed excellent electrochemical properties, such as a high volumetric capacity (1st discharge/charge capacity was 840/663?mA h cm(-3)) with a high initial coulombic efficiency, stable cycle behavior (636?mA h cm(-3) over 100 cycles), and fast rate capability (550?mA h cm(-3) at 3C). This layered SnP3 anode will be applicable to a new anode material for rechargeable LIBs.

SUBMITTER: Park JW

PROVIDER: S-EPMC5075908 | biostudies-other | 2016 Oct

REPOSITORIES: biostudies-other

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Electrochemical Li Topotactic Reaction in Layered SnP3 for Superior Li-Ion Batteries.

Park Jae-Wan JW Park Cheol-Min CM

Scientific reports 20161024

The development of new anode materials having high electrochemical performances and interesting reaction mechanisms is highly required to satisfy the need for long-lasting mobile electronic devices and electric vehicles. Here, we report a layer crystalline structured SnP3 and its unique electrochemical behaviors with Li. The SnP3 was simply synthesized through modification of Sn crystallography by combination with P and its potential as an anode material for LIBs was invest ...[more]

PMID: 27775090

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Project description:Nanoparticles produced by bacteria, fungi, or plants generally have physicochemical properties such as size, shape, crystalline structure, magnetic properties, and stability which are difficult to obtain by chemical synthesis. For instance, Mn(II)-oxidizing organisms promote the biomineralization of manganese oxides with specific textures under ambient conditions. Controlling their crystallinity and texture may offer environmentally relevant routes of Mn oxide synthesis with potential technological applications, e.g., for energy storage. However, whereas the electrochemical activity of synthetic (abiotic) Mn oxides has been extensively studied, the electroactivity of Mn biominerals has been seldom investigated yet. Here we evaluated the electroactivity of biologically induced biominerals produced by the Mn(II)-oxidizer bacteria Pseudomonas putida strain MnB1. For this purpose, we explored the mechanisms of Mn biomineralization, including the kinetics of Mn(II) oxidation, under different conditions. Manganese speciation, biomineral structure, and texture as well as organic matter content were determined by a combination of X-ray diffraction, electron and X-ray microscopies, and thermogravimetric analyses coupled to mass spectrometry. Our results evidence the formation of an organic-inorganic composite material and a competition between the enzymatic (biotic) oxidation of Mn(II) to Mn(IV) yielding MnO2 birnessite and the abiotic formation of Mn(III), of which the ratio depends on oxygenation levels and activity of the bacteria. We reveal that a subtle control over the conditions of the microbial environment orients the birnessite to Mn(III)-phases ratio and the porosity of the assembly, which both strongly impact the bulk electroactivity of the composite biomineral. The electrochemical properties were tested in lithium battery configuration and exhibit very appealing performances (voltage, capacity, reversibility, and power capability), thanks to the specific texture resulting from the microbially driven synthesis route. Given that such electroactive Mn biominerals are widespread in the environment, our study opens an alternative route for the synthesis of performing electrode materials under environment-friendly conditions.

Dataset Information

Electrochemical Li Topotactic Reaction in Layered SnP3 for Superior Li-Ion Batteries.

Publications

Electrochemical Li Topotactic Reaction in Layered SnP<sub>3</sub> for Superior Li-Ion Batteries.

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