Solid Solutions of LiCo_1−𝑥Ni_𝑥O_𝟐 (𝑥=0,0.1,…,0.9) Obtained via a Combustion Synthesis Route and Their Electrochemical Characteristics

Table 1

Electrochemical performances of LiCo_1−𝑥Ni_𝑥O₂ (𝑥=0, 0.1, …0.9) and LiCoO₂ annealed at 700°C for 24 h.

Material; 700°C, 24 h	Theoretical value	1st discharge capacity (mAh g^−1)	2nd discharge capacity (mAh g^−1)	30th discharge capacity (mAh g^−1)	Capacity loss after 30th cycles (%)	Oxidation peak (V)	Reduction peak (V)	RIR; 𝐼(003)/𝐼(104)	𝑅 factor; [𝐼(006) + 𝐼(012)]/𝐼(101)
LiCo0.1Ni0.9O2	274.43	66	61	56	15.15	5.18	2.80	0.94	1.00
LiCo0.2Ni0.8O2	274.36	95	90	86	9.47	5.11	2.76	1.07	0.83
LiCo0.3Ni0.7O2	274.35	146	141	113	22.6	5.15	2.82	1.17	0.62
LiCo0.4Ni0.6O2	274.23	152	150	132	13.16	5.10	2.92	1.32	0.62
LiCo0.5Ni0.5O2	274.16	162	158	136	16.05	4.99	2.63	1.33	0.54
LiCo0.6Ni0.4O2	274.10	165	162	138	16.36	4.89	3.22	1.38	0.51
LiCo0.7Ni0.3O2	274.03	155	150	138	10.97	4.65	3.35	1.40	0.53
LiCo0.8Ni0.2O2	273.96	145	140	134	6.94	4.92	3.14	1.42	0.49
LiCo0.9Ni0.1O2	273.89	143	138	129	9.79	4.99	3.12	1.46	0.43
LiCoO2	273.83	149	146	134	9.46	5.04	2.95	1.58	0.43