Optimization and Characterization of Lithium Ion Cathode Materials in the System (1 – x – y)LiNi0.8Co0.2O2 • xLi2MnO3 • yLiCoO2

Venkatesan, M.; Chennabasappa, Madhu; Garrett, Joshua

doi:10.3390/en3040847

Cited by 16 publications

(4 citation statements)

References 49 publications

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“…This coincides with the core level of Li 1s [44,45], indicating that Li + exists in the LZO thin film.…”

Section: Resultssupporting

confidence: 66%

Fabrication and Characteristic of a Double Piezoelectric Layer Acceleration Sensor Based on Li-Doped ZnO Thin Film

Zhao

et al. 2019

Micromachines

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In this paper, a double piezoelectric layer acceleration sensor based on Li-doped ZnO (LZO) thin film is presented. It is constituted by Pt/LZO/Pt/LZO/Pt/Ti functional layers and a Si cantilever beam with a proof mass. The LZO thin films were prepared by radio frequency (RF) magnetron sputtering. The composition, chemical structure, surface morphology, and thickness of the LZO thin film were analyzed. In order to study the effect of double piezoelectric layers on the sensitivity of the acceleration sensor, we designed two structural models (single and double piezoelectric layers) and fabricated them by using micro-electro-mechanical system (MEMS) technology. The test results show that the resonance frequency of the acceleration sensor was 1363 Hz. The sensitivity of the double piezoelectric layer was 33.1 mV/g, which is higher than the 26.1 mV/g of single piezoelectric layer sensitivity, both at a resonance frequency of 1363 Hz.

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“…This coincides with the core level of Li 1s [44,45], indicating that Li + exists in the LZO thin film.…”

Section: Resultssupporting

confidence: 66%

Fabrication and Characteristic of a Double Piezoelectric Layer Acceleration Sensor Based on Li-Doped ZnO Thin Film

Zhao

et al. 2019

Micromachines

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“…Presence of the Mn in the +4 oxidation state has been confirmed by the binding energy peak corresponding to Mn2p 3/2 at 642.5 eV. 31 It is important to point out that the Mn in +4 oxidation state is crucial for best electrochemical performance of the material. 10 Binding energy peak corresponding to the Ni2p 3/2 has been observed at 855.0 eV, showing the presence of Ni in the +2 oxidation state.…”

Section: Resultsmentioning

confidence: 90%

“…10 Binding energy peak corresponding to the Ni2p 3/2 has been observed at 855.0 eV, showing the presence of Ni in the +2 oxidation state. 31 No changes in the peak position corresponding to the Mn 4+ and Ni 2+ have been observed after treating the sample with ZnO. Presence of the Zn at the surface of the ZnO-treated LLNMO sample is reflected by the presence of the peak corresponding to Zn2p 3/2 at 1021.5 eV.…”

Section: Resultsmentioning

confidence: 93%

Electrochemical and Structural Investigations on ZnO Treated 0.5 Li₂MnO₃-0.5LiMn_0.5Ni_0.5O₂Layered Composite Cathode Material for Lithium Ion Battery

Singh

Thomas

Kumar

et al. 2012

J. Electrochem. Soc.

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0.5Li 2 MnO 3 -0.5LiMn 0.5 Ni 0.5 O 2 composite cathode material with and without ZnO treatment has been synthesized using carbonate based co-precipitation method for rechargeable lithium ion battery. The X-ray diffraction study confirms that the material has layered LiNi 0.5 Mn 0.5 O 2 structure along with the formation of the superlattice ordering of Li 2 MnO 3 ; without any major change in the crystal structure with ZnO treatment. Raman spectroscopy has revealed two different types of ionic arrangements corresponding to space groups of C2/m and R3m for Li 2 MnO 3 and LiNi 0.5 Mn 0.5 O 2 respectively. Morphological studies revealed primary particles are of ∼1 micron size and have sharp, elongated edges. The particles are present as spherical agglomerates (∼10 micron). Elemental mapping and X-ray photoelectron spectroscopy confirmed the presence of Zn in the ZnO treated samples. Charge/discharge capacity of the composite cathode materials (with and without ZnO coating) increases with number of cycles due to more and more activation of the Li 2 MnO 3 . However, ZnO treated 0.5Li 2 MnO 3 -0.5LiMn 0.5 Ni 0.5 O 2 composite material showed higher charge/discharge capacites attaining saturation in less number of cycles. Lower resistance to charge transfer in the case of ZnO treated sample is responsible for its better performance.

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“…Figure 6b shows the Li 1s spectra of 5 wt% Li-doped ZnO thin films. The Li 1s peak was observed at around 55.3 eV, the binding energy of Li 1s core level is in the range 52–56 eV [14,15,16]. The quantitative analysis result shows that the weight percentage of Li elements is 4.36 wt% [17].…”

Section: Resultsmentioning

confidence: 99%

Fabrication Technology and Characteristics Research of the Acceleration Sensor Based on Li-Doped ZnO Piezoelectric Thin Films

Zhao

Bai

et al. 2018

Micromachines

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An acceleration sensor based on piezoelectric thin films is proposed in this paper, which comprises the elastic element of a silicon cantilever beam and a piezoelectric structure with Li-doped ZnO piezoelectric thin films. The Li-doped ZnO piezoelectric thin films were prepared on SiO2/Si by radio frequency (RF) magnetron sputtering method. The microstructure and micrograph of ZnO piezoelectric thin films is analysed by a X-ray diffractometer (XRD), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), and piezoresponse force microscopy (PFM), respectively. When the sputtering power of 220 W and Li-doped concentration of 5%, ZnO piezoelectric thin films have a preferred (002) orientation. The chips of the sensor were fabricated on the <100> silicon substrate by micro-electromechanical systems (MEMS) technology, meanwhile, the proposed sensor was packaged on the printed circuit board (PCB). The experimental results show the sensitivity of the proposed sensor is 29.48 mV/g at resonant frequency (1479.8 Hz).

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Optimization and Characterization of Lithium Ion Cathode Materials in the System (1 – x – y)LiNi0.8Co0.2O2 • xLi2MnO3 • yLiCoO2

Cited by 16 publications

References 49 publications

Fabrication and Characteristic of a Double Piezoelectric Layer Acceleration Sensor Based on Li-Doped ZnO Thin Film

Fabrication and Characteristic of a Double Piezoelectric Layer Acceleration Sensor Based on Li-Doped ZnO Thin Film

Electrochemical and Structural Investigations on ZnO Treated 0.5 Li₂MnO₃-0.5LiMn_0.5Ni_0.5O₂Layered Composite Cathode Material for Lithium Ion Battery

Fabrication Technology and Characteristics Research of the Acceleration Sensor Based on Li-Doped ZnO Piezoelectric Thin Films

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Optimization and Characterization of Lithium Ion Cathode Materials in the System (1 – x – y)LiNi0.8Co0.2O2 • xLi2MnO3 • yLiCoO2

Cited by 16 publications

References 49 publications

Fabrication and Characteristic of a Double Piezoelectric Layer Acceleration Sensor Based on Li-Doped ZnO Thin Film

Fabrication and Characteristic of a Double Piezoelectric Layer Acceleration Sensor Based on Li-Doped ZnO Thin Film

Electrochemical and Structural Investigations on ZnO Treated 0.5 Li2MnO3-0.5LiMn0.5Ni0.5O2Layered Composite Cathode Material for Lithium Ion Battery

Fabrication Technology and Characteristics Research of the Acceleration Sensor Based on Li-Doped ZnO Piezoelectric Thin Films

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Electrochemical and Structural Investigations on ZnO Treated 0.5 Li₂MnO₃-0.5LiMn_0.5Ni_0.5O₂Layered Composite Cathode Material for Lithium Ion Battery