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2026-03-31
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Li-Ion Battery Technology
Patent Highlights – Free Version

Biaxially stretched sub-10 μm PVDF-HFP solid electrolyte membranes, CO-assisted SiH4 CVD depositing low-valence SiOx in porous carbon anodes, and LiSbO3/LiSbF6 composite solid electrolyte coatings for ultra-high-Ni NMC cathodes

Prospective High Impact Advancements

⚡
Electrolytes
Solid & Semi-Solid
QingTao Power Technology
Biaxially stretched PVDF-HFP / PEO membrane (sub-10 μm via supercritical CO2 plasticizer extraction) with LLZO + LATP fillers, hot-laminated onto LMO:NCM cathode for hybrid liquid electrolyte cells
1000 cyc: 91.6%
POSCO Holdings
Glass fiber-reinforced Li6PS5Cl solid electrolyte sheet (bundle weight 6 g/km, 3 μm strand diameter, NBR binder) for self-standing all-solid-state cell assembly
σ: 1.1 × 10−3 S/cm, 97% @50 cyc
Samsung SDI
Succinonitrile phase-change plasticizer pre-ionizing LiTFSI (7 : 3 mass ratio) in Li6PS5Cl argyrodite membrane for solvent-free lithium salt incorporation
σ: 8.5 × 10−4 S/cm @45°C
−
Anode
Negative Electrode
Shin-Etsu Chemical
CO-assisted monosilane CVD (350–360°C, 50 kPa) depositing low-valence SiOx (0–3 valence, 0.8 nm grain size) bonded to OH-modified porous carbon active sites
Retention: 80% @1000 cyc
Toyota Motor
3LiBH4-LiI hydride solid electrolyte coating (15 mass%) on porous Si (BET 55 m2/g) suppressing sulfide electrolyte contact in all-solid-state cells
FCE: 88.1%
Shanghai Shanshan New Material
Single rotary kiln integrating Si CVD and carbon coating with two-stage gas preheating and intermittent pressure-controlled cycling
Utilization: ≥99.5% Si source
+
Cathode
Positive Electrode
BASF Shanshan Battery Materials
Three-stage dry sintering converting residual Li2CO3 into LiSbO3/LiSbF6/Li2CO3 composite solid electrolyte coating (0.86 mass%) on ultra-high-Ni NMC (Ni0.93)
DCR: 15.8 Ω
CATL / Jiangsu Lithitech
LMFP precursor from elemental Mn and Fe powder dissolved in organic acid and H3PO4, achieving SO42− < 26 ppm and Na+ < 5 ppm impurity levels
FCE: 98.78%
Umicore
Boron surface coating (H3BO3 + LiOH, 350°C anneal) on Co-free Li-rich Mn-rich oxide (Li1.28Ni0.38Mn0.62O2) for sulfide solid-state cells
Init. capacity: 246.2 mAh/g
Benchmarking Experiments in Patents ⓘ
These benchmarks are drawn directly from experiments reported in the patents, where an inventive example incorporating the claimed innovation is compared against a comparative example that omits it while keeping the cell configuration, chemistry, and test conditions otherwise equivalent.
Ionic Conductivity with Succinonitrile-LiTFSI Additive (Samsung SDI)
8.5 × 10−4 S/cm
5.4 × 10−4 S/cm
Succinonitrile–LiTFSI composite (7 : 3 mass ratio, 2 mass%) in Li6PS5Cl membrane with butyl acrylate binder vs. Li6PS5Cl with binder only (no plasticizer–lithium salt addition) • ionic conductivity at 45°C
1000-Cycle Retention with CO-Assisted SiOx Deposition (Shin-Etsu Chemical)
80%
72%
Low-valence SiOx (0–3 valence) deposited via SiH4 in CO presence + acetylene carbon coating vs. SiH4 deposition without CO (Si0 + SiO2 bulk phase) • capacity retention after 1000 cycles, 0.7 C charge / 0.5 C discharge, full cells
DC Resistance Reduction with Composite Solid Electrolyte Coating (BASF Shanshan Battery Materials)
15.8 Ω
25.3 Ω
LiSbO3/LiSbF6/Li2CO3 composite coating (0.86 mass%) on Ni0.93 NMC via three-stage dry sintering vs. water-washed uncoated matrix • DCR, coin half-cells, 4.35–3.0 V vs Li+/Li (lower is better)
Initial Discharge Capacity of B-Coated Li-Rich Mn-Rich Oxide in Sulfide Solid-State Cells (Umicore)
246.2 mAh/g
175.5 mAh/g
Boron surface coating (H3BO3 + LiOH wet coating, 350°C anneal) on Li1.28Ni0.38Mn0.62O2 vs. uncoated Li1.28Ni0.38Mn0.62O2 without B coating • initial discharge capacity at 0.1 C discharge, sulfide solid-state cells, 4.3–2.5 V vs Li+/Li, 60°C