Figure - available from: Batteries & Supercaps
This content is subject to copyright. Terms and conditions apply.
a) XPS full spectra, b) Si 2p spectra, c) Cu 2p spectra of Si96.3(CuO)3.7, Si90.3(CuO)9.7, Si89.9(CuO)3.5(NiO)6.6 and Si87.5(CuO)3.4(NiO)9.1 samples. d) Ni 2p spectra of Si89.9(CuO)3.5(NiO)6.6 and Si87.5(CuO)3.4(NiO)9.1.
Source publication
The fast capacity degradation of silicon‐based anodes significantly limits the application in lithium‐ion battery (LIB) industries. Recently, Si−CuO composites have been reported as promising anodes in terms of being cost‐effective and technically feasible, but improved cycle stability is still desired. This work introduces a proper amount of NiO i...
Similar publications
The nanosized rod‐like LiMnPO4/C cathode materials have successfully in situ synthesized on the surface of flaky structure MnPO4·H2O self‐sacrificing template by the hydrothermal method. The crystal microstructure, micro shape, and electrochemical parameters of LiMnPO4/C are comprehensively studied by XRD, SEM, TEM, and electrochemical measurement...
Li‐rich cathode materials (LRMs) are regarded as the key cathode candidates for next‐generation lithium‐ion batteries(LIBs) because of their high specific capacity and environmental friendliness. However, LRMs encounter poor cyclability and low initial coulombic efficiency (ICE) hindering their practical application. Herein, a general near‐surface...
Cobalt‐free ultrahigh‐nickel layered oxide cathodes hold great promise for reducing the cost and enhancing the energy density of Li‐ion batteries. However, the increasing Ni content and the elimination of Co could cause severe interfacial and structural degradation, leading to poor electrochemical performance of ultrahigh‐nickel layered oxide catho...
A graphene-supported sandwiched composite (HAT-CN/Gr) was successfully fabricated through the layer-by-layer self-assembly of hexaazatriphenylenehexacarbonitrile (HAT-CN) on the surface of GO followed by thermal reduction. As applied to lithium-ion batteries (LIBs), the as-fabricated HAT-CN/Gr cathodes exhibit a superior reversal capacity (225 mA h...
Developing sacrificial cathode pre‐lithiation technology to compensate for active lithium loss is vital for improving the energy density of lithium‐ion battery full‐cells. Li 2 CO 3 owns high theoretical specific capacity, superior air stability, but poor conductivity as an insulator, acting as a promising but challenging pre‐lithiation agent candi...
Citations
... Given that utilization of pure alloy anodes remains challenging, commercial efforts tend to focus on graphite-Si blends with Si contents usually less than 20 % [11,12]. On a lab scale, inclusions of other (in-)active elements like Cu or Cr seem another feasible alternative [13,14]. Owing to the unsatisfactory performances of pure alloy anodes, there is a resurgence of interest in reevaluating old alloy anode candidates for higher capacities and improved performance. ...
... This non-obvious potential shift is most likely a result of the superior Li diffusion in the β-LiAl. Zhang et al. [13] reported a Li diffusivity of ca. 10 − 7 cm 2 s − 1 at room temperature in the β-LiAl [37], which may further improve at higher temperatures. ...
The binder migration due to the capillary force‐driven solvent evaporation during the drying process in the electrode manufacturing process induces inhomogeneous binder distribution in the electrode, which deteriorates Li‐ion kinetics and corresponding poor fast‐charging properties in lithium‐ion batteries (LIBs). Here, we report an effective strategy to mitigate the binder migration behavior by applying an electric field during the drying process. As the employed carboxymethyl cellulose (CMC) and styrene‐butadiene rubber (SBR) binders have a negative charge in an aqueous anode slurry system (pH 7), the binder migration behavior could be mitigated by generating an electrical attraction force into the bottom direction by positive electrification of the current collector. The anode prepared with electric field exhibits homogeneous binder distribution in the longitudinal direction, which enhances Li‐ion kinetics, corresponding constant current charging capacity, and cycling stability compared to those of the anode prepared without electric field.
