Resistance Reduction Effect by SDX^®in Lithium-Ion Batteries

Abstract

SDX ® which is surface coated aluminum current collector (Al) with carbon black and organic binder, makes a cell resistance lower and adhesion between cathode active material and Al stronger, so as to improve battery performances dramatically. The cell resistance was separated simply into electronic resistance and ionic resistance. We successfully separated the electronic resistance into material resistance and interface resistance between cathode active material and Al. And then, we independently measured the material resistance and the interface resistance by Electrode Resistance Meter (HIOKI E.E. CORPORATION) which can separate electrode resistance into material and interface resistance. In this paper, more detailed examinations were carried out, and resistance reduction effect by SDX ® in lithium ion battery (LIB) was tried to be clarified.

Modification of aluminum current collectors with laser-scribed graphene for enhancing the performance of lithium ion batteries

“…In general, the electrode resistance can be divided into material resistance and interface resistance between the active layer and metal electrode. A. Takeda et al have successfully individual measured the material resistance of the electrode composite and the interface resistance between the electrode composite and the current collector using the electrode resistance meter (RM2610 HIOKI) [40][41][42]. Here, we also measure the material resistance and interface resistance of LTO electrode to study the impact of PDG layer on the electronic resistance.…”

Dissecting the Solid Polymer Electrolyte–Electrode Interface in the Vicinity of Electrochemical Stability Limits

“…This is especially important since the electrode composition and morphology will affect the current response . The original purpose of the carbon coating is to create good electronic contact and adhesion between the electrode composite and current collector, and it has a negligible capacity contribution. , The LFP reference was embedded in PCL:LiTFSI via hot pressing at 90 °C; see the Experimental Section for details. To guarantee that the polymer electrolyte did not chemically decompose during hot pressing, the thermal stability was evaluated using thermal gravimetric analysis (TGA).…”

“…XPS of the pristine Cu–C electrode reveals C 1s peaks at 284.0, 285.0, 286.0, and 288.1 eV corresponding to CC, C–C/C–H, C–O/C–N, and CO, indicating carbon black and possibly adventitious carbon on the copper surface. According to the manufacturer, the carbon black is held together using an organic binder, most likely containing nitrogen as indicated by the peak at 399.8 eV. , Two Cu 2p peaks are also observed at 932.7 and 934.3 eV, corresponding to Cu and copper oxides; see Figure S10. As seen in Figure S10, the Cu–C electrode interface remained more or less unchanged after contact for 72 h at 40 °C and after reduction to 1.5 V vs Li + /Li.…”

“…XPS of the pristine Cu−C electrode reveals C 1s peaks at 284.0, 285.0, 286.0, and 288.1 eV According to the manufacturer, the carbon black is held together using an organic binder, most likely containing nitrogen as indicated by the peak at 399.8 eV. 28,29 Two Cu 2p peaks are also observed at 932.7 and 934. 23 The carbon peaks are accompanied by two additional O 1s peaks at 532 and 533.8 eV (marked in red), corresponding to CO and C−O.…”