由于TBB-PE隔膜的这些组合效应,即使在苛刻的充放电条件下,采用TBB-PE隔膜的Li||NCM811全电池也表现出显著改善的循环性能。 Kim, K. J.; Park, S. J.; Choi, Y. J.; Kim, H.; Cheon, J.; Lee, J.-W.; Yim, T. Sacrificial separator ...
传统研究聚焦于单晶与多晶材料的性能差异,但对其相变路径的形态依赖性机制尚不明确。本文通过原位高能同步辐射XRD技术,首次揭示多晶NCM532在H1-H2相变中出现的单斜中间相,并阐明其对结构稳定性和循环性能的影响,为高性能NCM材料设计提供新...
especially for Ni-rich NCMs.In-situ X-ray diffraction(XRD)reveals that the multiple caxis parameters appear at the high-voltage regions in Nirich NCMs,which is probably triggered by the larger obstruction of Li(de)intercalation.Particularly,NCMs with moderate Ni fraction also present a similar...
Ni-rich layered LiNi0.84Co0.10Mn0.06O2 cathode material was modified by doping with vanadium to enhance the electrochemical performances. The XRD, FESEM and XPS analyses were indicated that the vanadium is successfully doped in the crystal lattice of LiN
For the X-ray diffraction analysis (XRD) (Figure 2a), the black mass sample was macerated in an agate mortar to achieve a particle size of 0.045 mm (325 mesh). The analysis was performed by the Panalytical equipment, Aeris model, using a Cu source (with Cu-Kα radiation source with ...
LiTiO2-coated LiNi0.815Co0.15Al0.035O2 was synthesized through in situ hydrolysis-lithiation [122]. At 1 C, the discharge capacity was 164.1 mAh g−1, and the capacity retention after 100 cycles was 90.8%. The improvement is even more important at high rate: at 10 C, the capacity was ...
He also explores the degradation mechanisms of advanced cathode materials (especially the Ni-rich NCM) with XRD, STEM, Ex/in-situ ss-NMR and Ex/in-situ XAS. Dr. Haiping Jia is currently a lithium-ion batteries expert in Mercedes-benz AG. She was a research associate of the Pacific ...
Furthermore, the in-situ X-ray diffraction (XRD) results show that the Nb-modification suppresses phase transition during the electrochemical processes and enhances structural stability. This study proposes a potential solution for addressing the use of rechargeable batteries at extreme temperatures....
MPbmSQ=vdm#4(}xdkAr3iN z*U222@ 2%pVQX4##M7!cf2g% z@c76(8Ew;u2{ZzAeEsdAtjdRWq)f8BOT&jU291TrHupWxMK&sNxEaGPLN={P!CX6q zK%9J-#V6({apuenZht?XrD6gZPp#z?ZMw@KM?gBYEoMshA?7G%oBZAd&j}$wOE&+p zEXsuI5t~GvxVK oh%mNz(Z)mLJ&mBVf+Ha+u<{i3-W+Q?SPZ zl...
In situ XRD illustrates that the polycrystalline and single crystal NCMs show a virtually identical manner and magnitude in lattice contraction and expansion during cycling. Also, the electrochemically active surface area (ECSA) measurement is employed in lithium‐ion battery study for the first time,...