Effect of an organic additive on the cycling performance and thermal stability of lithium-ion cells assembled with carbon anode and LiNi1/3Co1/3Mn1/3O2 cathode

Investigation of layered LiNi1/3Co1/3Mn1/3O2 cathode of lithium ion battery by electrochemical impedance spectroscopy

“…At the open circuit potential, 3.5 V, the Nyquist plots show a small semicircle in the high-frequency (HF) region, a large semicircle in the middle-frequency (MF) region and a line with a slight incline in the low-frequency (LF) region. These results are different from what has been reported in the literature [42][43][44], but are in agreement with the results that we obtained for LiMn 2 O 4 and LiCoO 2 electrodes in our previous studies [31,32]; they illustrate that the amount of the conductive additive that is present in the composite material and the contact between the cathode film and the aluminium current collector can have a significant impact on the EIS features. As the electrode polarisation potential increases, the small HF semicircle does not change significantly; however, below 3.9 V, the diameter of the large MF semicircle decreases rapidly.…”

“…As a result, the EIS features of LiNi 1/3 Co 1/ 3 Mn 1/3 O 2 should be similar to those of LiCoO 2 , and the Nyquist plots of the electrochemical intercalation of lithium into LiNi 1/ 3 Co 1/3 Mn 1/3 O 2 should exhibit three semicircles and an inclined line. However, the EIS spectra of LiNi 1/3 Co 1/3 Mn 1/3 O 2 that were measured in previous studies [42][43][44] exhibited only two semicircles and an inclined line. The two semicircles were attributed to the migration of lithium ions through the SEI film and the charge transfer step, and the inclined line was attributed to the solid state diffusion.…”

Armoring LiNi1/3Co1/3Mn1/3O2 Cathode with Reliable Fluorinated Organic–Inorganic Hybrid Interphase Layer toward Durable High Rate Battery

“…To the best of our knowledge, this performance is more than the previous results, a comparison of this work with the latest literature has been made and the specific values are listed in Table S2 (Supporting Information). [ 42,43 ] In addition, the improvement of Li anode induced by the coadditives is also explored. The NMC//Li battery is disassembled after 100 cycles and then reassembled a new battery by replacing a fresh Li foil anode.…”

Additives for Functional Electrolytes of Li-Ion Batteries

“…Many of the additives originally developed for the graphite anode have been found to be able to form films on the cathode as well, such as VC [10,36,142], VEC [77], FEC [99], LiBOB [124], and LiDFOB [179]. Other than these additives, the additives [72], dimethylacetamide [154], tris(hexafluoro-iso-propyl)phosphate [121], and tris(trimethylsilyl)phosphate [167].…”