Lithium Squarate (Li2C4O4) Powder as Cathode Pre-Lithiation Additive for Lithium-Ion Battery, 10 g/bottle, CLIBCPLALS

Lithium squarate (Li2C4O4), also known as dilithium squarate, is an emerging organic sacrificial lithium salt used for the pre-lithiation of lithium-ion batteries (LIBs) and lithium-ion capacitors (LICs). It is considered a "green" and high-efficiency alternative to inorganic supplements like Li5FeO4 (LFO) because it decomposes during the first charge into environmentally benign gaseous byproducts (CO or CO2) and lithium ions, leaving behind virtually no dead weight or metal residues. The key features of Li2C4O4 as lithium pre-lithiation additive are: (1) No Dead Weight: Upon oxidation, the squarate anion (C4O4)2-) decomposes into gases. This means you gain lithium ions to build a stable SEI layer without adding inactive mass that would otherwise lower the battery's overall energy density. (2) SEI Stabilization: Beyond just providing lithium, its decomposition products help form a less soluble and more stable Solid Electrolyte Interphase (SEI). This leads to better capacity retention over hundreds of cycles. (3) High Efficiency: Adding just 2.5% to 5% weight can improve first-cycle efficiency by 5% to 15% in high-capacity systems like silicon-graphite anodes.

Part Number	CLIBCPLALS (C-LIB-CPLA-LS)
Appearance	Pristine Li2C4O4: White Li2C4O4/Carbon Composite: Grey or Black
Chemical Formula/Structure	Li2C4O4
Additive Types	(1) Pristine Li2C4O4 (2) Li2C4O4/Carbon composite (carbon content is 5 wt%)
Purity	>99%
pH	7.5-8.5
Addition Amount	2.5-5.0 wt%
Pre-Lithiation Mechanism
Package Size	10 g/bottle

Notes: Please try to store the Li2C4O4 powder in a dry place (glovebox is the best option). 

References: 

1. A. Gomez-Martin, et al. Opportunities and Challenges of Li2C4O4 as Pre-Lithiation Additive for the Positive Electrode in NMC622||Silicon/Graphite Lithium Ion Cells, Adv. Sci., 2022, 9, 2201742.
2. I. L. Abdullahi, et al. Lithium Squarate as Sacrificing Electrolyte Additive for Prelithiation: Case Study in Zero-Excess Lithium Metal Batteries, Adv. Sci.. 2026, DOI:10.1002/advs.202517221.