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Dec 16, 2025
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Li-Ion Battery Technology
Patent Highlights – Free Version

Silicon seed layers for anode-free cells, porous Si clathrate selectivity and pore control for Si anodes, and buffer pore strategies for high-Ni cathodes

Prospective High Impact Advancements

⚡
Electrolytes
Solid & Semi-Solid
LG Energy Solution / University of California
Anode-free cell with amorphous Si seed layer (500 nm) on Cu
Jcrit: 5.0 mA/cm2
Sakuú
3D porous cathode with oriented carbon-coated sidewalls
Full electrode utilization
Saint Gobain / CIC Energigune
Y-halide electrolyte heat treatment creates Y-rich protective layer
Halide-Li interface stability
−
Anode
Negative Electrode
Toyota Industries
Selective porous Si clathrate II via controlled AlF3 particle size (D50: 56 μm)
Ratio: 14.0 (porous Si clathrate II/I)
NEXEON
Pore-volume-controlled Si-C via (Si/C)×P1 ratio optimization
Retention: 83% @150 cyc
Sionic Energy
Unmodified PAN binder (no cyclization) for Si-C composite
Life: >1300 cyc
+
Cathode
Positive Electrode
L&F
Polypropylene-templated buffer pores in high-Ni NCM core
Capacity: 210 mAh/g
LG Chemical
Multi-doped LMFP (≥3 elements from Al/B/Co/Mg/Ni)
Retention: 99.7% @30 cyc
BTR
Spray pyrolysis for controlled Al heterogeneity in high-Ni NCM
Capacity: 216 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.
Critical Current Density (LG Energy Solution / University of California)
5.0
1.0
+400%
Si seed layer (500 nm) vs. bare Cu • mA/cm2 in LiPON cells
Si Clathrate Selectivity (Toyota)
14.0
0.7
+1789%
Classified AlF3 (D50: 56 µm) vs. uncontrolled particle size • porous Si clathrate II/I ratio
Si-C Retention Consistency (NEXEON)
83%
69-81%
Stable
Pore-volume control ((Si/C)×P1 ratio) vs. high-Si baseline • retention at 150 cycles, improved consistency
PAN Binder Cycle Life (Sionic)
1300
1100
+18%
Unmodified PAN (no cyclization) vs. cyclized PAN • cycles to 80% capacity
High-Ni NCM Retention (L&F)
96.3%
92.1%
+4.6%
Polypropylene-templated buffer pores vs. standard synthesis • retention at 50 cycles, 45°C
High-Ni NCM DC Resistance (BTR)
15
25
−40%
Spray pyrolysis – heterogeneous Al dopant distribution vs. mechanical mixing • Ω (lower is better)

Recently Published Company Chapters
(Solid-state / Semi-solid Li-ion Battery Innovation & Patent Review)

🏢
South Korea
Samsung
Product Development Pathway
Dual-track approach: Sulfide electrolytes for EVs combining bulk conductivity optimization through doping, interface engineering with halide coatings, stratified membrane architectures, and scalable spray pyrolysis manufacturing. Oxide electrolytes for microscale electronics leveraging metal-doped glass systems, dual-layer electrolyte architectures, and low-temperature co-sintering processes.
Key synergies between R&D concepts (oxides): Well-rounded bulk electrolyte + manufacturing scalability + co-sintered edge isolation regions
Read Full Chapter →
🏢
Japan
Toyota
Product Development Pathway
Sulfide/halide electrolytes emphasizing manufacturing quality control through atmospheric management, moisture resistance via surface modification, multi-layer interface stabilization strategies, and protective coating systems. Oxide electrolytes utilizing flux-mediated synthesis methods, compact-porous bilayer structures, carbon-coated porous layers, and stress-managed bipolar architectures.
Key synergies between R&D concepts (sulfides/halides): Consistent ionic conductivity + environmental stability + cathode interface electrochemical stability
Read Full Chapter →
🏢
China
BYD
Product Development Pathway
Sulfide electrolytes featuring multi-element bulk modification for mechanical property tuning, pseudohalogen surface engineering for solvent compatibility, phosphide-sulfide bilayer interfaces, composite membrane reinforcement with structural fillers, and plasma-modified binder systems for processing optimization. Polymer electrolytes incorporating ionic liquid designs, electrochemical safety mechanisms, and mixed ionic-electronic conductors.
Key synergies between R&D concepts (sulfides): Mechanical bulk properties + surface degradation protection + lithium metal interface stabilization
Read Full Chapter →