4. CONCLUSION
In summary, a novel cellulose/CaCO3 porous membrane was fabricated by electrospinning method. The as-prepared membrane used as separator possesses excellent thermal and dimensional stability at harsh temperatures, thus significantly enhancing the thermal safety of batteries. In addition, the electrolyte uptake (234%) and ionic conductivity (1.08 mS cm-1) of membrane are superior to that of PP separator. Furthermore, the LiFePO4/Li battery assembled with cellulose/CaCO3 membrane can run for 230 cycles with 97.4% capacity retention. Taking the above advantages into consideration, cellulose/CaCO3 membrane manifests great potential application in sustainable and high-performance LIBs.