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2026-05-12
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Li-Ion Battery Technology
Patent Highlights – Free Version

In-situ co-crystallized donor-acceptor interfacial electrolytes for sulfide solid-state batteries, ethylboronic acid-derived boron doping in carbon for silicon CVD anodes, and aluminosilicate molecular sieve coatings on Li-rich Mn-based cathodes

Prospective High Impact Advancements

⚡
Electrolytes
Solid & Semi-Solid
Beijing WeLion New Energy Technology
Deep eutectic interfacial electrolyte formed in situ between NCM811 and Li6PS5Cl/SEBS membrane via co-crystallization of separately deposited succinonitrile (donor) and LiTFSI (acceptor) at 70°C
Retention: 95% @50 cycles
CATL
Sealed metallic battery pack with U-shaped housing, tear-groove pressure relief mechanism, and optional internal H2S adsorbent / basic species for sulfide-based all-solid-state cells
Design: sealed shell + pressure venting
Qingtao Power Technology
Trilayer composite solid electrolyte membrane: Li3YCl6 halide (positive side), Li6PS5Cl sulfide core, LiBH4 borohydride (negative side)
Retention: 96.1% @200 cycles
−
Anode
Negative Electrode
BTR New Material Group / Panasonic Energy
Boron doping (1.4 mass%) of bamboo-derived porous carbon via ethylboronic acid pyrolysis (800°C), forming B4C in the skeleton and surface boron oxides, prior to silane CVD silicon deposition
FCE: 93.2%
eCube Material
Granular porous Si composite from waste silicon kerf, with plate-shaped Si coated by SiO2 / SiC / pyrolytic carbon multi-layer (H2O2 oxidation 800°C, then methane CVD 950°C)
Retention: 80.2% @500 cycles
BYD
Polyacrylic acid (inner, 20 nm) / polyethylene oxide (outer, 20 nm) bilayer on amine-functionalized Si-C composite (silane CVD), crosslinked via thermal ester formation at 150°C
Retention: 98.37% @100 cycles
+
Cathode
Positive Electrode
BASF Shanshan / BASF
Na-CHA aluminosilicate molecular sieve coating (Na2O·Al2O3·35SiO2, <1 μm thickness) on Li-rich Mn-based layered oxide via mechanical mixing + 400°C heat treatment
Retention: 87.2% @1000 cycles
EcoPro BM
Two-step lithiation of Zr-doped polycrystalline Mid-Ni NMC (Ni0.60Co0.10Mn0.30, 0.1 mol% Zr, 920°C sintering); local lattice distortion suppresses crystallite growth (146 nm) and stabilizes grain boundaries
Strength: 15.53 kgf/mm2
SK on
Blend of single-particle (D50 3.8 μm, crystallite 282 nm) and bi-modal secondary-particle (small/large D50 2.75/15.82 μm at 20:80) high-Ni NMC of identical composition (Ni0.88Co0.10Mn0.02)
Retention: 95.5% @200 fast-charging cycles
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.
Cycle Retention with In-Situ Deep Eutectic Interfacial Electrolyte (Beijing WeLion)
95%
50%
In-situ co-crystallized succinonitrile (donor) / LiTFSI (acceptor) pair (7 : 1 mol) at NCM811 / Li6PS5Cl interface, fused at 70°C vs. no donor/acceptor coatings • capacity retention after 50 cycles, 0.33 C charge / 0.33 C discharge, NCM811 / Li6PS5Cl / Li-In cells, 4.2–2.7 V
Gas Evolution Suppression with Boron-Doped Carbon Anode (BTR / Panasonic)
5.3
56.2
Ethylboronic acid-derived boron-doped bamboo carbon (1.4 mass% B; B4C in skeleton + surface boron oxides) prior to silane CVD silicon vs. non-doped (B = 0, O = 0.01 mass%) bamboo carbon • gas evolution after 50 cycles at 1 C charge / 1 C discharge, half-cells with EC/EMC + LiPF6, 0.01–1.5 V vs Li, in cm3/kg/d (lower is better)
Long-Cycle Retention with Aluminosilicate Molecular Sieve Coating (BASF Shanshan / BASF)
87.2%
80.6%
Na-CHA aluminosilicate molecular sieve coating (Na2O·Al2O3·35SiO2, <1 μm, base material : sieve = 1000 : 2 mass) vs. uncoated Li-rich Mn-based layered oxide • capacity retention after 1000 cycles at 1 C charge / 1 C discharge, pouch full cells with graphite anode, 4.45–2.5 V
Fast-Charging Cycle Retention with Single + Bi-Modal Secondary Particle Blend (SK on)
95.5%
80%
Blend of single-particle (D50 3.8 μm) and bi-modal secondary-particle high-Ni NMC of identical Ni0.88Co0.10Mn0.02 composition (single : secondary = 20 : 80 mass) vs. single-particle high-Ni NMC only • capacity retention after 200 fast-charging cycles (multi-step 3.25–0.5 C charge to 72% DOD in 25 min, 1/3 C discharge), pouch full cells with graphite/Si-C anode