Mitigating the Kinetic Hindrance of the Poly/Single-Crystalline Ni-Rich Cathode-Based Electrode via Formation of the Superior Electronic/Ionic Pathway

Abstract

In previous work, it was confirmed that even if the same cathode active material is used, the performance of the electrode could be improved by solving issues such as the electrochemically inactive areas caused by nonuniform dispersion of the conductive agents, electrolyte penetration blocking caused by agglomerated carbon black, and low electrode porosity. Herein, the use of CNTs, a material with excellent dimensional stability and high electron conductivity (103 S cm–1) as conductive agent, is expected to be a solution that can reduce ion concentration polarization at high C rates by increasing the electrode porosity, as well as maintaining a good electron pathway. Therefore, in this study, we investigate how the addition of CNTs affects the performance of poly/single-crystalline Ni-rich NCM-based cathode electrodes. The results confirm that by adding CNTs to the poly/single-crystalline Ni-rich NCM-based electrode under high-rate (540 mA g–1) cycle conditions, the cycle retentions were improved by 3% in 50 cycles.

Polymer Tetrabenzimidazole Aluminum Phthalocyanine Complex with Carbon Nanotubes: A Promising Approach for Boosting Lithium-Ion Battery Anode Performance

“…As the scan rate increased, the reduction peak shifted to lower potentials, the oxidation peaks shifted to higher potentials, and the current values increased. With respect to the surface capacitive kinetics, the CV curve showed a wide redox peak equivalent to that of the supercapacitor framework. , Conversely, a sharp redox peak was observed in the diffusion-controlled battery system. Considering the fundamental electrochemistry, the CV diagram can be expressed as follows i = a v b log ( i ) = b 0.25em log ( v ) + log ( a ) where a and b can be obtained from the linear fitting of log i versus log υ (Figure D).…”

“…With respect to the surface capacitive kinetics, the CV curve showed a wide redox peak equivalent to that of the supercapacitor framework. 40,41 Conversely, a sharp redox peak was observed in the diffusion-controlled battery system. Considering the fundamental electrochemistry, the CV diagram can be expressed as follows…”

Elucidating the Relationship between Quality Control of the Coating Layer and Suppression of Gas Evolution in Li-Ion Batteries

“…Figure S12d indicates the ratios of the capacity generated in the CVC mode to the capacities including the CVC capacities of the pristine, HMPM, and LMPM samples Table S3 lists the CC and CVC mode capacity values of all samples at the first and 100th cycles.…”

“…78 Figure S12d indicates the ratios of the capacity generated in the CVC mode to the capacities including the CVC capacities of the pristine, HMPM, and LMPM samples. 79 Table S3 lists the CC and CVC mode capacity values of all samples at the first and 100th cycles. Although the CC capacities after the first cycle were similar for all samples, there were large differences after the 50th cycle, and the LMPM showed a CVC capacity lower than those of the pristine and HMPM samples.…”

Superb Li-Ion Storage of Sn-Based Anode Assisted by Conductive Hybrid Buffering Matrix

“…The need for high-capacity and high-rate Li-ion batteries (LIBs) has been intensified by the growing demand for various applications that require long-lasting and fast-rechargeable batteries, such as portable electric devices and electric vehicles [1][2][3][4][5][6][7][8][9][10][11][12]. The anode-one of the key components in LIBs-stores or releases energy by hosting/expelling Li ions paired with the cathode.…”