Lee, Byeong Gwon Lee, Seung Hun Do, Vandung Lee, Jae Woo Choi, Sun Ho Kim, Woong Cho, Won Il 2024-03-07T05:30:04Z 2024-03-07T05:30:04Z 2024-03-07 2024-02 1944-8244 https://pubs.kist.re.kr/handle/201004/149413 The high theoretical capacity (similar to 2000 mAh g(-1)) of silicon suboxide (SiOx, with 1 < x < 2) can solve the energy density issue of the graphite anode in Li-ion batteries. In addition, it has an advantage in terms of volume expansion or side reactions compared to pure Si or Li metals, which are considered as next-generation anode materials. However, the loading content of SiOx is limited in commercial anodes because of its low cycle stability and initial coulombic efficiency. In this study, a nitrogen-doped carbon layer with Cu beads (N-C/Cu) derived from copper phthalocyanine (CuPc) is applied to a SiOx electrode to improve its electrochemical performance. The SiOx electrode is simultaneously coated with a Cu- and N-doped carbon layer using CuPc. N-C/Cu synergistically enhances the electric conductivity of the electrode, thus improving its electrochemical performance. The SiOx/N-C/Cu composite has better cyclability and higher capacity (1095.5 mAh g(-1)) than the uncoated electrode, even after 200 cycles in the 0.5 C condition. In full-cell cycling with NCM811 cathodes, the SiOx (60 wt % of SiOx, with a n/p ratio of 1.1) and graphite-mixed (7.8 wt % of SiOx, with a n/p ratio of 1.1) anodes also show improved electrochemical performances in the same conditions. English American Chemical Society Co-synthesis and Electrochemical Investigation of the Nitrogen-Doped Carbon Layer with Metallic Nano Beads on the SiOx Anode for Lithium Secondary Batteries Article 10.1021/acsami.3c16105 1 ACS Applied Materials & Interfaces, v.16, no.8, pp.10042 - 10051 ACS Applied Materials & Interfaces 16 8 10042 10051 N scie scopus 001164691700001 2-s2.0-85185571283 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Science & Technology - Other Topics Materials Science Article LI-ION BATTERY PERFORMANCE PHTHALOCYANINE GRAPHITE NANOCOMPOSITE COMPOSITE CHEMISTRY lithium-ion battery advanced anode material silicon suboxide nitrogen-doped carbon coppernano beads