Preparation and characterization of LiNiO2 synthesized from Ni(OH)2 and LiOH·H2O

Significant role of “burned” graphene in determining the morphology of LiNiO2 prepared under the air conditions

“…This indicates that lithium ions can de-intercalate from or intercalate into the graphene-burned LiNiO 2 facilely. It must be admitted that the shape of CV curves obtained here was rather different from the previously reported one [31]. In Yang's report [31], three pairs of oxidation-reduction peaks, being associated with the three steps of the phase formation in lithium intercalation, were observed in the CV curves.…”

“…It must be admitted that the shape of CV curves obtained here was rather different from the previously reported one [31]. In Yang's report [31], three pairs of oxidation-reduction peaks, being associated with the three steps of the phase formation in lithium intercalation, were observed in the CV curves. Although it was addressed [31] that the shape of CV curves for LiNiO 2 was closely related to the potential window employed and the potential scanning rate used, the novel CV curves of LiNiO 2 presented in this work were probably originated from the unique morphologies of the as-prepared LiNiO 2 particles.…”

“…In Yang's report [31], three pairs of oxidation-reduction peaks, being associated with the three steps of the phase formation in lithium intercalation, were observed in the CV curves. Although it was addressed [31] that the shape of CV curves for LiNiO 2 was closely related to the potential window employed and the potential scanning rate used, the novel CV curves of LiNiO 2 presented in this work were probably originated from the unique morphologies of the as-prepared LiNiO 2 particles. Generally, the value of the peak potential separation between the oxidation and reduction peak can be used to evaluate the reversibility of an electrochemical reaction [32].…”

“…Generally, the semicircle in the high and medium frequency region is related to the charge transfer process, and the value of the diameter corresponds to the value of charge transfer resistance (R ct ). The inclined line in the low frequency region represents the Warburg impedance, which is associated with the lithium-ion diffusion in the prepared cathode materials [31]. Approximately, the values of R ct for sample a, b, c and d were estimated to be 79, 84, 70 and 196 V, respectively.…”

Synthesis of optimized LiNiO2 for lithium ion batteries

“…The same has been verified through electrochemical studies carried out using 2016 type coin cells. As has been already reported, the performance of LiNiO, strongly depends upon the type of starting materials, heating atmosphere and the heating sequence [7,24]. Similar attempts were made under different heat treating conditions.…”