Texture effect on the electrochemical properties of LiCoO2 thin films prepared by PLD

Xia, Hui; Lü, Li

doi:10.1016/j.electacta.2007.05.019

Cited by 75 publications

(67 citation statements)

References 28 publications

(37 reference statements)

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“…If the discharge capacity at 2 A/cm 2 is assumed as the full capacity of the film, about 61.5% of its full capacity can be retained at 20 A/cm 2 (∼2 C rate). The rate capability results of the LiNi 0.5 Mn 0.5 O 2 film indicate sluggish Li diffusion kinetics in the film when compared with layered LiCoO 2 and spinel LiNi 0.5 Mn 1.5 O 4 thin film electrodes [15,16]. For spinel LiNi 0.5 Mn 1.5 O 4 thin film prepared by PLD, the thin film electrode can maintain about 94% of its full capacity at about 3 C rate [16].…”

Section: Resultsmentioning

confidence: 98%

Li diffusion in LiNi0.5Mn0.5O2 thin film electrodes prepared by pulsed laser deposition

Xia

Lü

Lai

2009

Electrochimica Acta

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Section: Resultsmentioning

confidence: 98%

Li diffusion in LiNi0.5Mn0.5O2 thin film electrodes prepared by pulsed laser deposition

Xia

Lü

Lai

2009

Electrochimica Acta

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“…Since the intensity ratio of both phases is insensitive to the laser power, it is easy to deduce that the both phases have similar growth mechanism. If the amount of the impurity is to be decreased, the target with higher Li + content may be required [25].…”

Section: Resultsmentioning

confidence: 99%

“…PLD shows its advantages over other methodologies according to the film density, the uniformity, the limited number of the defects, etc. Quite a few groups have applied PLD to deposit LiCoO 2 film on stainless steel (SS) [12][13], Si [13][14][15][16], quartz glass [17], Au [8,18], Pt substrates [8,[17][18][19][20]. However, few reports discussed the influence of film thickness on the film microstructure in detail.…”

Section: Introductionmentioning

confidence: 98%

LiCoO2 thin film cathode fabricated by pulsed laser deposition

Huo

Chen

et al. 2011

Rare Metals

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LiCoO 2 polycrystalline thin film cathode was prepared by pulsed laser deposition (PLD). The higher power density of the excimer laser beam leads to the film consisting of highly crystallized cylindrical nanoparticles. Furthermore, the film thickness plays an important role on the film orientation as well as the diameter of the oxide cylinders. The film orientation was not fixed with (003) plane parallel to the substrate while the thickness was up to 300 nm. Meanwhile, the diameter of part of the cylindrical particles was increased due to a preferred growth induced by a driving force changing from surface energy to volume strain energy. The electrochemical tests indicate that flat charge/discharge plateaus corresponding to the first-order phase transition appear at around 3.85 V vs. Li/Li + , resulting in high utilization of the active material and good capability retention.

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“…10),12) Xia reported that Li + ion diffusivity in (104)-oriented LiCoO 2 film prepared by PLD was ten times faster than that in a (003)-oriented film. 4) Randomly oriented LiCoO 2 films prepared by PLD had better charge/discharge capacities than (003)-oriented films.…”

Section: Introductionmentioning

confidence: 99%

“…4) Hence, the orientation and morphology of the LiCoO 2 films should be controlled for good transportations of Li + ions at interfaces between a cathode and an electrolyte.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Li–Co–O film by metal organic chemical vapor deposition

Katsui

Yamashita

et al. 2013

J. Ceram. Soc. Japan

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LiCoO 2 films were prepared on polycrystalline Al 2 O 3 substrates by metal organic chemical vapor deposition (MOCVD), and the effect of the Li to Co source vapor ratio (R Li/Co ) and substrate temperature (T sub ) on the phases, orientation, morphology, and deposition rates were investigated. At R Li/Co > 2.0, Li 2 CO 3 , Li x Co 1¹x O, and a LiCoO 2 CoO solid solution were co-deposited with LiCoO 2 , whereas Co 3 O 4 was co-deposited with LiCoO 2 at R Li/Co < 0.7. Single-phase LiCoO 2 films were obtained in the R Li/Co range of 0.72.0 at T sub > 873 K. Rutherford backscattering spectrometry revealed that single-phase LiCoO 2 film had uniform and stoichiometric composition. The orientation of single-phase LiCoO 2 films changed from (003) to (104) and (012) with increasing T sub at R Li/Co ³ 1.0. LiCoO 2 film co-deposited with Co 3 O 4 at R Li/Co = 0.4 showed significant (101) orientation. The (003)-oriented LiCoO 2 had a flat surface with hexagonal faceted texture, whereas the (101)-and (104)-oriented LiCoO 2 had platelet grains in which the plate faces were tilted relative to the substrate surface. The highest deposition rate of single-phase LiCoO 2 film was 1020¯m h ¹1, which was 100 times greater than that reported in the literature.

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Texture effect on the electrochemical properties of LiCoO2 thin films prepared by PLD

Cited by 75 publications

References 28 publications

Li diffusion in LiNi0.5Mn0.5O2 thin film electrodes prepared by pulsed laser deposition

Li diffusion in LiNi0.5Mn0.5O2 thin film electrodes prepared by pulsed laser deposition

LiCoO2 thin film cathode fabricated by pulsed laser deposition

Preparation of Li–Co–O film by metal organic chemical vapor deposition

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