Study of the Conversion Reaction Mechanism for Copper Borate as Electrode Material in Lithium-Ion Batteries

Parzych, G.; Mikhailova, Daria; Oswald, Steffen; Eckert, J.; Ehrenberg, Helmut

doi:10.1149/1.3597612

Cited by 18 publications

(29 citation statements)

References 18 publications

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“…In situ and operando SXRD has been intensively carried out to study the electrochemical reaction mechanism of insertion, conversion, and alloy-type electrode materials with a focus on tracking structural and phase evolution and the formation of defects and strain in lithium-ion, [141][142][143][144][145][146][147][148][149] Li-S/Se, [28,98,150,151] and Li-O 2 [152][153][154] batteries with cycling and operation at various temperatures.…”

Section: Wwwadvancedsciencenewscom Wwwsmall-methodscommentioning

confidence: 99%

Synchrotron‐Based X‐ray Absorption Fine Structures, X‐ray Diffraction, and X‐ray Microscopy Techniques Applied in the Study of Lithium Secondary Batteries

et al. 2018

Small Methods

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Owing to the recent advance of third‐generation synchrotron radiation (SR) sources, SR‐based X‐ray techniques have been widely applied to study lithium‐ion batteries, lithium–sulfur batteries, and lithium–oxygen batteries to solve material challenges. SR‐based techniques provide high chemical and physical sensitivity and a comprehensive picture of material structure and reaction mechanisms. An in‐depth understanding of batteries is imperative for the development of future energy storage devices with enhanced electrochemical performance to meet societies' growing need for devices with high energy density. Here, recent progress in the application of SR techniques for lithium secondary batteries with a focus on several techniques, including X‐ray absorption fine structure, synchrotron X‐ray diffraction, and synchrotron X‐ray microscopy techniques is reviewed. The working principle for all characterization techniques is introduced to provide context for how the technique is used in the field of energy storage. Through discussing the utilization of SR techniques in different directions of batteries, including electrodes, electrolytes, and interfaces, the practical application strategies of techniques in batteries are clarified. By summarizing and discussing the application of SR techniques in batteries, the aim is to highlight the crucial role of SR characterization in the development of advanced energy materials.

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Section: Wwwadvancedsciencenewscom Wwwsmall-methodscommentioning

confidence: 99%

Synchrotron‐Based X‐ray Absorption Fine Structures, X‐ray Diffraction, and X‐ray Microscopy Techniques Applied in the Study of Lithium Secondary Batteries

et al. 2018

Small Methods

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“…The intense cathodic peaks at 1.92 and 1.4 V indicate the amorphization and formation of Cu nanoparticles and lithium terephthalate as described in Equation (1). This is further supported by the reduction of Cu II to Cu 0 via intermediate Cu I at these potentials according to Parzych20 and Sahay et al 21. The broad peak at 0.73 V is due to the various alloying reactions of Li with Cu [Eq.…”

Section: Resultsmentioning

confidence: 63%

A Chemoenzymatic Route To Prepare Acyclic Nucleoside Analogues

et al. 2016

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“…32 Such a behavior was also observed for a Cu 3 B 2 O 6 -based conversion-type electrode, where Cu 0 could only be oxidized to Cu 1+ , but Cu 2+ became accessible again if very high amounts of carbon were added as an electron conducting agent. 33 The second reduction is observed at about 1.2 V (Cu 2+/1+ /Cu 0 ) and at about 1.0 V (Co 3+ /Co 0 ). The cell voltage of these redox pairs is constant over the next 30 cycles, but the current decreases especially for the cobalt oxide sample.…”

Section: Resultsmentioning

confidence: 93%

Investigation of Copper-Cobalt-Oxides as Model Systems for Composite Interactions in Conversion-Type Electrodes for Lithium-Ion Batteries

Wadewitz

Gruner

Herklotz

et al. 2013

J. Electrochem. Soc.

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Different Cu-Co-O mixtures (CCO) with cation ratios from 5:1 to 1:5 were investigated as conversion type electrodes in half cells against lithium counter electrodes. To achieve a nearly homogeneous distribution of the elements on the nanometre scale, the self-combustion method was employed. The electrochemical redox behavior of the single oxides and CCO were characterized with cyclic voltammetry and galvanostatic cycling. These investigations showed different element specific electrochemical characteristics. Copper oxide was more stable with respect to cycling stability, while cobalt oxide had a higher specific capacity. The combination of both elements in ternary CCO leads to an improvement of the specific capacity and the cycling stability compared to the binary metal oxides of only copper and cobalt, respectively. This stabilization effect qualifies CCO as a promising model system to elucidate the underlying mechanisms in such composites with complex interactions between the different metals during conversion and in successive cycling.Lithium ion batteries (LIB), firstly commercialized by Sony Corporation in 1991, 1 are actually the favorite power sources in portable electronic devices like mobile phones or notebooks. 2 Currently applied electrode materials mainly react according to the intercalation mechanism. 3 In this case lithium ions are inserted into stable host structures and are extracted without structure decomposition. Therefore, the possible attainable capacity is limited by the changes, the crystal structure of the host is able to withstand. 4 To overcome this disadvantage 3d transition metal oxides, which follow a displacement or conversion-type mechanism, have recently gained the interest of the scientific community. The advantage over e.g. intercalation materials is the proposed independency from a stable crystal host structure as long as Li can react with a redox active partner. Furthermore, theoretical specific capacities larger than 600 mAh/g can be achieved, since more than one Faraday charge per mole is transferred during the electrochemical reaction. The principle of a conversion reaction with an irreversible structure change can be deduced from equation 1:This electrode type was spotlighted by the works of Tarascon et al. [5][6][7][8] The starting material is converted into an amorphous mixture of metallic clusters embedded in a Li 2 O-matrix. 4 A wide range of possible materials including 3d transition metal oxides, 5,7-11 sulfides 12,13 or hydrides 14 can be used as conversion-type electrodes. The above mentioned advantages are accompanied by limitations like the rather low cycling stability and the large potential difference between charge and discharge. 4 This constraints have to be circumvented before commercial applications might become viable. To improve the cycling stability ternary compounds like CuFe 2 O 4 , 15 NiFe 2 O 4 , 16,17 CoFe 2 O 4 , 16,18 FeCo 2 O 4 19 and CuCo 2 O 4 20were synthesized or assisting compounds like SnO 2 21 were added. The interaction of two or more elem...

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Study of the Conversion Reaction Mechanism for Copper Borate as Electrode Material in Lithium-Ion Batteries

Cited by 18 publications

References 18 publications

Synchrotron‐Based X‐ray Absorption Fine Structures, X‐ray Diffraction, and X‐ray Microscopy Techniques Applied in the Study of Lithium Secondary Batteries

Synchrotron‐Based X‐ray Absorption Fine Structures, X‐ray Diffraction, and X‐ray Microscopy Techniques Applied in the Study of Lithium Secondary Batteries

A Chemoenzymatic Route To Prepare Acyclic Nucleoside Analogues

Investigation of Copper-Cobalt-Oxides as Model Systems for Composite Interactions in Conversion-Type Electrodes for Lithium-Ion Batteries

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