Structural, electrical and electrochemical properties of LiNiO2

Thermal Behavior of Delithiated Li1−xMnPO4 (0 ≤ x <1) Structure for Lithium‐Ion Batteries

“…The lithium insertion/extraction reaction, however, is difficult compared with LiFePO 4 because of the poor lithium-ion diffusion and electron conductivity. [7][8][9][10][11][12][13][14] Several trials have been carried out to overcome these serious problems by applying the nanosized particles 15,16 and carbon coating, 17,18 respectively. We obtained the nanosized and homogeneous carboncoated particles, and particle and crystal changes in the sample were observed using transmission electron microscopy (TEM) and X-ray diffraction (XRD).…”

Composite Cathode Material for Li-Ion Batteries Based on LiFePO4 System.

“…Molenda & Stokłosa, 1989), Li x NiO 2 (J. Molenda et al, 2002), Li x WO 3 (J. Molenda & Kubik, 1989), Li x YBa 2 Cu 3 O 7 (J. , Li x Mn 2 O 4 (J.…”

Li-ion batteries for electric vehicles

“…Long-lasting author's research on various Li x M a X b systems: Li x TiS 2 [5], Li x CoO 2 [6], LiNiO 2 [7] , Li x (Co,Ni,Mn)O 2 [8], Li x VO 2 [9], Li x NbSe 2 [10], Li x WO 3 [11], Li x YBa 2 Cu 3 O 7 [12], Li x Bi 2 Sr 2 CaCu 2 O 8 [13], Li x Mn 2 O 4 [14], Ligraphite [15], Li x FePO 4 [16] showed that lithium intercalation into transition metal compounds with metallic or semiconducting properties is a topotactic redox reaction, in which transition metal ion changes its oxidation number, thus electron structure plays significant role in this process. Electrons (together with equivalent number of lithium ions) introduced into cathode material locate at available electron levels and raise the Fermi level in a way, which depends on density of states function.…”

“…Complex research on oxide cathode materials for Li-ion batteries conducted by the author [6][7][8] points towards serious and diverse possibilities of improvement of electrochemical properties of Li(Co,Ni,Mn)O 2 layered oxides, as well as enhancement of their chemical stability and reversible capacity. Those oxides show exceptional ionic-electronic transport properties, which are even improved in the process of lithium deintercalation, due to the occurrence of semiconductor-metal transition [6].…”

“…Wide range research carried out on optimisation of cathode material based on layered transition metal oxides in prof. Molenda's group [6][7][8][9][10][11][12][13][14] are directed towards the enhancement of chemical stability by introduction of manganese into cathode material (LiNi 1-y-z Co y Mn z O 2 ). Introduction of manganese affects material because of two factors: electron configuration Mn 3+/4+ (t 2g 3 e g 1/0 ) and shift of 2p oxygen band out of the Fermi level variation region (Co 3+/4+ , Ni 2+/4+ ) upon deintercalation/intercalation.…”