PBC {Poly(butylene carbonate, QPAC60} Granulate as Solid-State & Gel Polymer Electrolyte, 20-100 g/bottle, CSSGPEPBC

Poly(butylene carbonate) (PBC) granulate—often referenced commercially as QPAC® PBC—is an aliphatic polycarbonate that functions as a high-performance polymer matrix host for Solid-State Electrolytes (SSEs) and Gel Polymer Electrolytes (GPEs). Because of its rubbery nature, low glass transition temperature (Tg ~ 0-20), and polar carbonate backbone (-O-CO-O-), PBC offers unique advantages for lithium-metal and post-lithium battery architectures compared to traditional crystalline matrices like Poly(ethylene oxide) (PEO).

The main features of the PBC granulate are: (1) Amorphous Nature & Low Tg: Unlike PEO, which suffers from high crystallinity at room temperature that severely impedes Li+ mobility, PBC's amorphous tendencies and low Tg allow for higher segmental motion at ambient temperatures. This facilitates faster ion hopping and transport without requiring elevated operational heat. (2) Polar Carbonate Coordination: The high donor number of the carbonate groups (-COO-) assists in the efficient dissociation of lithium salts (such as LiTFSI, LiFSI, or LiPF6), ensuring high carrier concentration. (3) Mechanical Flexibility: PBC exhibits elastomer-like, rubbery mechanics, which is critical for accommodating the volumetric expansion and contraction of high-capacity anodes (like silicon or lithium metal) during cycling, preventing delamination at the electrode/electrolyte interface.

In All-Solid-State Polymer Electrolytes (ASSPEs), the PBC is deployed in solid-state configurations via solvent-free processing (such as dry extrusion/hot pressing) or solvent casting: (1) Copolymerization & Blends: PBC is frequently blended or copolymerized with PEO or cross-linked via UV-curing / thermal initiators to combine PEO's high solvating power with PBC's amorphous flexibility. (2) Interfacial Stability: Polycarbonate-based backbones form stable solid electrolyte interphase (SEI) layers on lithium metal anodes compared to ether-only chains, suppressing dendritic propagation and extending short-circuit resistance.

In Gel Polymer Electrolytes (GPEs), the PBC granulates act as the robust backbone host matrix: (1) Liquid/Plasticizer Retention: PBC's amorphous domains absorb and immobilize polar liquid plasticizers (e.g., EC/DMC/EMC mixed with LiPF6 or LiTFSI) to form a non-flowing, dimensionally stable gel membrane. (2) Ionic Conductivity Boost: GPEs derived from PBC matrices achieve high room-temperature ionic conductivities in the 10^{-4} to 10^{-3} S/cm range, bridging the gap between liquid electrolyte conductivity and solid-state safety.   Thermal Safety: The presence of the polymer network eliminates free-flowing solvent hazards, dramatically reducing flammability and preventing catastrophic electrolyte leakage during thermal runaway. 

Part Number	CSSGPEPBC (C-SSGPE-PBC)
CAS	96361-30-7
Chemical Formula	(C6H8O3)n
Appearance	White Granulate
Density	1.18-1.27 g/cm3
Decomposition Temperature	180-200℃
Glass Transition Temperature	0-35℃
Package Size	20 g, 50 g, and 100 g/bottle

Notes: Please try to store the PBC Granulate in a dry place (glovebox is preferred). 

References: 

1. M. Gastaldi, et al. UV-crosslinked poly(ethylene oxide)/poly(butylene carbonate) solid polymer electrolyte for long-life Li-metal batteries via solvent-free processing, Electrochimica Acta, 2026, 574, 149600
2. S. Wu, et al. Exploring electrode/polymer electrolyte interface chemistry and a regulating strategy of interfacial stability: a review, Mater. Chem. Front. (2024) 8 (18): 2924–2943.