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2026-01-27
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Li-Ion Battery Technology
Patent Highlights – Free Version

Interface engineering for sulfide solid-state batteries with TiNb2O7 anodes, vacancy defect-optimized silicon-carbon composites, and Ti-doped cathode surface supplements to compensate anode irreversible capacity losses

Prospective High Impact Advancements

⚡
Electrolytes
Solid & Semi-Solid
Maxell
Fibrillated PTFE intermediate layer with Li6PS5Cl (5 : 95 ratio)
1st Cycle Eff.: 84.5% vs 79.3%
Solid Power
High/low MW SEBS binders with ester-hydrocarbon solvents (2-ethyl-hexyl acetate, xylene)
Mechanically robust sulfide layer
Qingtao
PEO layer between halide & sulfide layers with silver-particle-containing holes
Retention: 91.8% @50 cyc
−
Anode
Negative Electrode
Shinzoom
Controlled vacancy defect porous carbon (EPR: 50.4 G linewidth) with CVD silicon
Capacity: 2,095 mAh/g
Advanced Materials Solutions
Transport reactor CVD with 1-50°C differential temperature control
Improved process consistency
SAIC Qingtao
CVD silicon coating (10-70 nm) bridging porous Si-C with silicon nanoparticles
Retention: 96.1% @300 cyc
+
Cathode
Positive Electrode
BASF Shanshan
Ti-doped Li2CO3 surface nanoparticles on Li1.16Ni0.75Co0.07Mn0.18Sr0.002Ti0.018O2.09
Capacity: 214.7 mAh/g
CATL
Fe-doped spinel LiNi0.45Fe0.1Mn1.45O4
Retention: 92.5% @200 cyc
SK ON
NCM811 with Ni oxidation ratio 0.98 via optimized sintering (750°C, 12 h)
Retention: 88% @500 cyc
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.
Improved Capacity Retention Due to Silver Nanoparticles (Qingtao)
91.8%
81.3%
Silver particles (100 nm diameter) vs. inert ceramic particles • 50 cycles at 1 C, 60°C
Si-Carbon First Cycle Efficiency (Shinzoom)
93%
81%
Controlled vacancy defects (EPR: 50.4 G linewidth) vs. insufficient vacancy defects (15.7 G) • two-stage heat treatment with KOH/steam activation
All-Solid-State Si Rate Capability (SAIC Qingtao)
88.5%
80.3%
20 nm silicon coating (90% coverage) vs. no coating layer • 1 C / 0.1 C discharge capacity retention
Spinel LNMO Mn Dissolution (CATL)
396
2,130
Fe-doped LiNi0.45Fe0.1Mn1.45O4 vs. undoped LiNi0.5Mn1.5O4 • Mn deposition on negative electrode (μg/g, lower is better)