Carboxymethylcellulose and carboxymethylcellulose-formate as binders in MgH₂-carbon composites negative electrode for lithium-ion batteries

W. Zaïdi (1) , Y. Oumellal (1) , Jean-Pierre Bonnet (1) , Junxian Zhang (2) , Fermin Cuevas (2) , Michel Latroche (2) , Jean-Louis Bobet (3) , Luc Aymard (1)

1 LRCS - Laboratoire réactivité et chimie des solides - UMR CNRS 7314
2 ICMPE - Institut de Chimie et des Matériaux Paris-Est
3 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux

Influence of carboxymethylcellulose sodium salt (CMC) and carboxymethylcellulose-formate (CMC-f) binders on the cyclability of a MgH2–33.3% CMC type binder–33.3%Ct,x electrodes has been investigated for the first time. These electrodes show a large reversible capacity of 1800–1900mAhg−1 at an average voltage of 0.5V vs. Li+/Li◦ which is suitable for the negative electrode in lithium-ion batteries. Moreover, addition of CMC or CMC-f binder with Ct,x carbon leads to an improved capacity retention with 240mAhg−1 and 542mAhg−1, respectively, compare to 174mAhg−1 for MgH2–18%Ct,x after 40 cycles.

Domaines: Matériaux

W. Zaïdi, Y. Oumellal, Jean-Pierre Bonnet, Junxian Zhang, Fermin Cuevas, et al.. Carboxymethylcellulose and carboxymethylcellulose-formate as binders in MgH₂-carbon composites negative electrode for lithium-ion batteries. Journal of Power Sources, 2011, 196 (5), pp.2854-2857. ⟨10.1016/j.jpowsour.2010.11.048⟩. ⟨hal-00553240⟩