The structure of low temperature crystallized LiCoO2

Structural Features of Low-Temperature LiCoO2and Acid-Delithiated Products

“…HT-LiCoO and LT-LiCoO samples were prepared as described in the literature (1,9,12). The HT-LiCoO sample was prepared by heating Li CO and CoCO at 850°C in air for 1 day (12).…”

“…Considerable efforts have been made previously to evaluate a ''low-temperature'' form of LiCoO (LT-LiCoO ) synthesized at 400°C as a positive electrode material for lithium batteries (1)(2)(3)(4)(5)(6)(7)(8)(9). LT-LiCoO has been reported to have very poor electrochemical properties, in contrast to the superior electrochemical performance of ''high-temperature'' Present address: Energizer/c.q, 25225 Detroit Road, P.O.…”

In-Situ Neutron Studies of Electrodes for Li-Ion Batteries Using a Deuterated Electrolyte: LiCoO2as a Case Study

“…Previous in-situ studies of LiCoO2 using commercial batteries by Sharma et al [45] showed that both forms of LiCoO2; the hexagonal one and the spinel-like phase [46][47][48][49][50][51][52], undergo a series of phase transitions during cycling, and it was proposed that the gradual build-up of the spinel-type phase might be a contributing factor to the observed capacity fade within LixCoO2 based batteries. Rodriguez et al [53] determined the variations in the lattice parameters of a LiCoO2-type material as a function of charge state, also in a commercial Liion cell, whilst changes in both the lattice parameters and lithium occupancies with repeated cell cycling were shown to be correlated with the degradation of cell performance [54].…”

X‐ray Absorption Spectroscopic Study of LiCoO2 as the Negative Electrode of Lithium‐Ion Batteries

“…[18] Results and Discussion X-ray absorption near edge structure (XANES) spectroscopy is a particularly well-suited technique for providing a deep insight into the oxidation state of the absorber atoms. The XAS spectra have been successfully used in the study of Li 1Àx CoO 2 [19][20][21] and cobalt species in lower oxidation states. [22,23] Figure 1 shows the normalized Co K-edge XANES of the as-received, ground for 180 min and heated at 850 8C, LiCoO 2 samples.…”