New experimental heat capacity and enthalpy of formation of lithium cobalt oxide

Enthalpies of formation of layered LiNixMnxCo1–2xO2 (0 ≤ x ≤ 0.5) compounds as lithium ion battery cathode materials

“…5a, the enthalpy of formation of LiCoO 2 from the elements determined in the present work is in a very good agreement with the results of Wang and Navrotsky [18,19], Wang et al [48] and Gotcu-Freis et al [21]. Comparing the enthalpies of formation from elements of LiCoO 2 in our work with the literature data, one should consider that the samples used in different studies are slightly different in the sense of preparation condition and chemical composition and consequently enthalpy values.…”

“…The obtained value of the enthalpy of drop solution in Ref. [21] is 118.26 ± 0.89 which is very close to the data of Ref. [48], indicating the two samples are very similar to each other.…”

“…Although in Ref. [21] the nonstoichiometric composition is used for further calculations of enthalpies of formation from oxides and elements from respective thermodynamic cycles, these values deviate only about 1 % from those of Refs. [18] and [48].…”

“…[18] b [19] c [48] d [21] e [24], solid-state synthesized sample. f [24], solution method-synthesized sample.…”

“…In Ref. [21], where commercial LiCoO 2 sample with unknown synthesis route is investigated by the same method, the measured composition of LiCoO 2 sample which is Li/Co = 0.977 ± 0.006 is used for similar calculations of enthalpies. The obtained value of the enthalpy of drop solution in Ref.…”