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2026-07-14
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Li-Ion Battery Technology
Patent Highlights – Free Version

High-entropy oxyhalide catholyte additives for high-voltage sulfide solid-state cells, low-orientation natural graphite blended with silicon-carbon composites in dry-processed anodes, and lithium-excess Fe/Mn layered–rocksalt oxide cathodes

Prospective High Impact Advancements

⚡
Electrolytes
Solid & Semi-Solid
CATL
High-entropy oxyhalide Li1.4Ta0.5Zr0.3In0.1Y0.1Er0.1O0.5Cl4.9F0.1 as a cathode-layer additive in high-voltage Ni83 / Li6PS5Cl cells (2.8–4.8 V)
Retention: 98.79% @50 cycles
QuantumScape
UV-cured crosslinked polyisobutylene (PIB) perimeter seal (≥95 mass% crosslinked) confining liquid catholyte to the cathode in garnet-separator anode-free lithium metal cells
Energy retention: ~95% @800 cycles
LG Energy Solution
Controlled pre-lithiation of SiOx via a low-pressure sacrificial Li6PS5Cl layer that strips away with residual lithium, leaving the working separator uncontaminated
ICE: 91.7%
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Anode
Negative Electrode
Samsung SDI
Dry-processed (PTFE-fibrillated, solvent-free) negative electrode blending low-orientation natural graphite (orientation degree 60), artificial graphite, and a silicon-carbon composite (47 : 47 : 6 by mass)
Fast-charge life: 1,500 cycles
Nexeon
In-situ Li2B4O7 pore-blocking agent that excludes silane from a fraction of the carbon framework's pores before chemical vapour infiltration, reserving silicon-free void volume for expansion
Reserved void: 20.9% of pore volume
Ningbo Ronbay
Dual mesopore–macropore porous silicon (A/C 64.2%, B/C 35.8%) from hydrogen-templated ionic-liquid etching of Mg2Si, with N-doped CVD carbon coating (42 nm)
Retention: 85.6% @100 cycles
+
Cathode
Positive Electrode
POSCO Holdings
Cobalt-free lithium-excess Fe/Mn oxide Li1.22Fe0.35Mn0.43O2 with combined layered and cation-disordered rocksalt domains (I(003)/I(104) = 0.94)
Energy density: 563 Wh/L
BASF Shanshan
Nb-doped Li-rich Mn-based cathode with three sequential coatings (Nb-lithium oxide, cobalt phosphate / LATP solid electrolyte, and nano-TiO2) suppressing high-temperature gassing
Capacity: 250.5 mAh/g
Sumitomo Metal Mining
Hollow NMC111 with shell-penetrating through-holes (30% of particles, 40 nm) formed by low-ammonia, timed oxidizing-to-non-oxidizing precursor synthesis, draining trapped electrode solvent to suppress OCV defects
Residual solvent: reduced (OCV defect suppression)
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.
High-Voltage Capacity Retention with Multi-Cation Oxyhalide Additive (CATL)
98.79%
89.83%
High-entropy oxyhalide additive (Li1.4Ta0.5Zr0.3In0.1Y0.1Er0.1O0.5Cl4.9F0.1) in the cathode composite vs. conventional oxyhalide LiTaOCl4 • 50-cycle capacity retention, Ni83 / Li6PS5Cl / Li-In cells, 2.8–4.8 V, 0.33 C, 25°C
Fast-Charge Cycle Life with Low-Orientation Natural Graphite (Samsung SDI)
1,500 cycles
750 cycles
Low-orientation natural graphite (orientation degree 60, I(002)/I(110)) blended with a silicon-carbon composite vs. high-orientation natural graphite (orientation degree 110) • cycles to 80% state of health under repeated 8–80% state-of-charge fast charging
Volumetric Energy Density vs. Conventional Olivine LMFP (POSCO Holdings)
563 Wh/L
432 Wh/L
Lithium-excess Fe/Mn layered–rocksalt oxide Li1.22Fe0.35Mn0.43O2 (no carbon coating) vs. carbon-coated olivine LiFe0.4Mn0.6PO4 • volumetric energy density, coin half-cells, 0.1 C discharge, 2.0–4.4 V, 25°C
High-Temperature Gassing Suppression with Triple-Coated Li-Rich Cathode (BASF Shanshan)
6.36 mL/Ah
11.32 mL/Ah
Nb-doped Li-rich Mn cathode with triple coating (Nb-lithium oxide, cobalt phosphate / LATP solid electrolyte, nano-TiO2) vs. same Nb-doped matrix with LATP coating alone • 28-day gas generation, graphite full cells, 60°C storage (lower is better)
Recently Published Company Chapters
🏢
Canada
Hydro-Québec
Technology Assessment: Hydro-Québec advances two parallel electrolyte routes – a sulfide platform on lithium metal and a reinforced polymer film – while licensing materials and IP rather than manufacturing cells. The chapter examines how a manufacturing-first sulfide approach positions against ionic conductivity trade-offs, how near-term polymer manufacturability complements longer-term sulfide development, and how public statements align with what the patent portfolio reveals about priorities.
Product Development Pathway
(5 R&D Concepts)
Manufacturing-compatible sulfide electrolyte – the lead concepts target the route's central risk: keeping a moisture-sensitive electrolyte cheap and processable while it cycles on lithium metal, via a moisture-tolerant synthesis and coatings for solvent-based electrode fabrication. Further concepts cover film consolidation without high-temperature sintering, contact retention, and large-format reinforcement.
Potential Synergies to Deliver Well-Rounded Cells for Application
A moisture-tolerant foundational electrolyte enables the coating, binding, and reinforcement concepts, while a shared ionic salt bridges the sulfide and polymer routes – balancing energy density, safety, and manufacturability.
🏢
United Kingdom
Ilika
Technology Assessment: Ilika advances two distinct solid-state platforms in parallel – large-format cells for electric vehicles and defence, and thin-film microbatteries for medical implants. The chapter examines how a low-temperature garnet densification approach positions against conventional ceramic processing, how near-term microbattery commercialization complements longer-term automotive development, and how public positioning aligns with what the patent portfolio reveals about priorities.
Product Development Pathway
(8 R&D Concepts)
Low-temperature garnet co-sintering anchors the large-format route, addressing the risk that ceramic densification would destroy an electrode's metal collectors and carbon additives; a current-collecting mesh built into the sintered electrode then removes that inactive mass. Further concepts cover thick-electrode transport, the microbattery route's thin-film stack, and interface protection during deposition.
Potential Synergies to Deliver Well-Rounded Cells for Application
A single low-temperature sintering window lets the built-in mesh collector, thick-electrode transport network, and garnet separator form in one co-sintered body – targeting high areal capacity with low inactive mass.