Due to its capacity to store energy, power devices, and carry objects, lithium-ion batteries are now more prevalent than ever in technology. As a result of this increased demand, it is essential to continue developing lithium-ion batteries with greater safety, reduced expenses, and increased energy and power density. Lithium-rich materials provide a viable cathode because of their low cost, little effect on the environment, and excellent specificity. However, the weak cycle stability of these batteries can negatively impact their lifespan. This issue is often caused by structural collapse during cycling, a common problem encountered with Li1.2Mn0.54Ni0.13Co0.13O2 (Tu80) and Li1.4Mn0.6Ni0.2Co0.2O2.4 (NFU80). One can utilize varying electrolyte compositions and additives to prevent issues.

This study examines Li-IZ additive salt electrolytes as new imide-based electrolytes, confirmed by NMR and Mass spectroscopy characteristics. Fresh Li-IZ additive salt will be compared with Li-BZ additive salt from the previous research group, where Li-BZ has been shown to enhance the efficiency of the LLNMO and MCMB as cathode and anode material. Electrolyte performance was performed by adding 0.1wt% Li-BZ and 0.1wt% Li-IZ to 1M LiPF6 base electrolyte in EC: EMC (3:7 vol%) through cyclic voltammetry and linear sweep voltammetry galvanostatic test. Ionic conductivity measurements were also carried out to evaluate ion transfer with and without additive salt electrolytes.

Comparative studies of performance on lithium-ion battery systems reported that with the addition of Li-BZ and Li-IZ, they experienced an increase in discharge capacity and columbic efficiency for both material differences (TU80 and NFU80) and temperature differences. Long cycle performance (100 cycles) also shows increased capacity retention with adding additive salt, drastically occurring in the NFU80 material with Li-BZ with a value of 84.96% and 76.56% with Li-IZ from 58.38% in the base electrolyte, thus in the TU80 material, slightly increasing capacity retention from 76.63% in base electrolyte to 77.43% with Li-IZ, and 79.04% with Li-BZ. Also, in the end, C1s and N1s spectra with the addition of Li-BZ and Li-IZ salt electrolytes demonstrated the existence of C=C, C=N, and C-N bonds through XPS analysis. Meanwhile, the proposed mechanism for the reaction of Li-BZ and Li-IZ additive salt electrolytes can be evaluated by analyzing F1s, O1s, and P2p spectra. The evidence has shown the effectiveness of Li-BZ as an additive salt electrolyte with a benzene ring content which helps in electron delocalization to speed up the degradation process in the NFU80 material.

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