Ni-rich NCM-based positive electrode materials exhibit appealing properties in terms of high energy density and low cost. However, these suffer from different degradation effects, especially at their particle surface. Therefore, this work, tungsten oxide is evaluated as a protective inorganic coating layer on LiNi0.8Co0.1Mn0.1O2 (NCM-811) for lithium-ion battery (LIB) cells investigated regarding rate capability cycling stability under operation conditions. Using electrochemical impedance...

The next generation of lithium ion batteries (LIBs) with increased energy density for large-scale applications, such as electric mobility, and also small electronic devices, microbatteries on-chip batteries, requires advanced electrode active materials enhanced specific volumetric capacities. In this regard, silicon anode material has attracted much attention due to its high capacity. However, the enormous volume changes during lithiation/delithiation are still a main obstacle avoiding broad...

Lithium metal as an electrode material possesses a native surface film, which leads to rough and this has negative impact on the cycling behavior. A simple, fast, reproducible technique is shown, makes it possible flatten thin film of lithium‐metal anode. Atomic force microscopy scanning electron images are presented verify success method X‐ray photoelectron spectroscopy measurements reveal that chemical composition lithium also changed. Furthermore, galvanostatic indicate superior behavior...

The practically available specific energy of Li ion batteries (LIB) is highly depending on the used charge/discharge current, since respective overpotentials each electrode affect two vital parameters, capacity and voltage. Focusing positive composite as bottleneck, overall nature overpotential discussed for LiNi1/3Co1/3Mn1/3O2 (NCM) active material. It shown that characteristic during charge (delithiation) discharge (lithiation) state (SOC) depth (DOD) dependent, respectively. was...

Because of the high specific capacity and low redox potential, lithium metal constitutes a promising material might be an option for energy density next-generation battery technologies, though application batteries (LMBs) is currently limited by poor long-term performance severe safety issues when liquid electrolytes are used. These challenges arise from formation "dead" or inhomogeneous deposits as well ineffective solid electrolyte interphase (SEI) layers on electrodes. Notably, consumed...

Lithium metal batteries are gaining increasing attention due to their potential for significantly higher theoretical energy density than conventional lithium ion batteries. Here, we present a novel mechanochemical modification method anodes, involving roll-pressing the foil in contact with ionic liquid-based solutions, enabling formation of an artificial solid electrolyte interphase favorable properties such as improved transport and, most importantly, suppression dendrite growth, allowing...

Abstract Phase transitions in the BaAl 2 O 4 –SrAl solid solution have been analysed as a function of temperature and composition using infrared (IR) powder absorption spectroscopy. The improper ferroelectric phase transition P 6 3 22 → (2A superstructure) end-member can be detected through change slope wavenumbers hard modes at ∽450 K. A line widths ∽520 K appears to correlate with development diffuse intensity * - b planes electron diffraction patterns reported elsewhere literature. same...

Abstract Lithium metal batteries (LMBs) have a great potential to become widely commercialized. However, an improved solid electrolyte interphase (SEI) is needed enable safe long‐term cycling. Here, further mechanochemical modification method developed, where lithium roll‐pressed in contact with ionic liquids (ILs). The choice of IL allows tailoring the composition and thickness SEI, examined via X‐ray photoelectron spectroscopy cryo transmission electronic microscopy, tune its properties...

Abstract Lithium-metal batteries face more challenges than lithium-ion (LIBs) with graphite based negative electrodes. One significant challenge derives from the highly reactive nature of lithium metal, which can react electrolytes upon contact to form solid electrolyte interphase (SEI) and develop detrimental dendrites cycling in contrast silicon anodes, require application current/voltage SEI. Studies focusing on metal SEI formation are less frequent those for other anode materials....

The manuscript reports the performance of a hybrid device containing spinel positive electrode material LiNi0.5Mn1.5O4 (LNMO). LNMO samples were synthesized via sol-gel process with post thermal treatment at 1000°C and then combined against an activated carbon negative electrode. obtained shows excellent cycling stability as well good electrochemical current rate 600 mA g−1 (corresponds to 10C for LNMO) in cell voltage range 3.3 V which is significantly high among reported lithium...

Abstract Here, we report on methyl 3‐cyanopropanoate (MCP) in combination with the conductive salt lithium bis(trifluoromethane)sulfonyl imide (LiTFSI) as a safe single‐solvent electrolyte for lithium‐ion batteries (LIBs). To investigate extent of anodic aluminum dissolution, an innovative electrochemical technique was introduced. Long‐term full‐cell [LiNi 1/3 Mn Co O 2 (NMC111)/graphite] cycling results confirm applicability LiTFSI/MCP‐based state‐of‐the‐art LIB active materials.

Spessartine (Mn3Al2Si3O12)-grossular (Ca3Al2Si3O12) solid solutions were synthesized at high pressures and temperatures. Compositionally homogeneous garnets are obtained by crystallizing solidsolution glasses prepared from oxides. The unit-cell parameter, a, for the different was determined X-ray powder diffraction methods results give positive deviations ideal volumes of mixing that can be described with a symmetric model Wv = 0.80 (±0.04) cm3/mol. degree non-ideality is function difference...

Long-term cycle aging experiments were performed on commercially available automotive type lithium-ion pouch cells under realistic conditions as found in electrical vehicles. The main mechanisms responsible for cell identified based a combined approach of electrochemical and post mortem analysis methods, attributed to the loss lithium through metal deposition graphite anode electrolyte decomposition side reaction. Furthermore, occurred spatially localized at different rates. Anode material...

The high specific capacity of Li-rich layered oxides up to 300 mAh g−1 renders them a promising class positive electrode materials for energy lithium ion batteries (LIBs). However, this material suffers from poor retention, voltage fade and structural degradation. degradation phenomena include phase transformation particle cracking during operation take place in the bulk as well active material's surface. In work, we demonstrate straightforward approach surface modification...

Nail penetration tests under adiabatic conditions are proposed as a new safety test method to simulate short circuit caused by intrusion in the worst case scenario, i.e., conditions. The behaviors of commercially available 18650 type lithium-ion cells with two different cell chemistries, LiNi 0.33 Co Mn O 2 - LiCoO blend (NCM-LCO blend) vs. graphite and LiFePO 4 (LFP) graphite, were investigated at states charge (SoC). results show small standard deviation for temperature pressure...

Abstract We synthesized the solid solution between sulfides CaS (oldhamite) and MgS (niningerite). Electron microprobe X‐ray diffraction showed homogeneous pure samples after synthesis. The calculated lattice parameters fit to earlier literature data. Mid‐infrared spectroscopy of reveal that produced were fragile tend alternate very fast. However, we able provide clean reflectance spectra all samples. un‐altered show no peaks or bands but a rather constant spectrum within analyzed spectral...