Lithium bis 2,2 -biphenyldiolato

They show high thermal stability for example the decomposition temperature of lithium bis[2,2 -biphenyldiolato(2-)0,0 ] borate is 270 °C [80],... 

There is a difference in the behavior of benzenediolatoborate and naphthalenedio-latoborate solutions on the one hand, and lithium bis[2,2 -biphenyldiolato(2-)-0,0 ] borate (point 5 in fig. 8) lithium bis[ sali-cylato (2-) Jborate (point 6) or benzene-diolatoborate/phenolate mixed solutions on the other (Fig.8). This can be tentatively explained by the assumption of different decomposition mechanisms due to different structures, which entail the formation of soluble colored quinones from benzenediolatoborate anions and lithium-ion conducting films from solutions of the latter compounds (points 5 and 6) [80], The assumption of a different mechanism and the formation of a lithium-ion conducting, electronically insulating film is supported by... 

Figure 9. CV of 0.2 mol kg 1 lithium bis[2,2 -biphenyldiolato(2-)-0,0 ]borate solution in PC at a stainless steel electrode, area 0.5 cm 2, showing the passivation of the electrode.

CV of solutions of lithium bis[ salicy-lato(2-)]borate in PC shows mainly the same oxidation behavior as with lithium bis[2,2 biphenyldiolato(2-)-0,0 ] borate, i.e., electrode (stainless steel or Au) passivation. The anodic oxidation limit is the highest of all borates investigated by us so far, namely 4.5 V versus Li. However, in contrast to lithium bis[2,2 -biphenyl-diolato(2-)-0,0 Jborate based solutions, lithium deposition and dissolution without previous protective film formation by oxidation of the anion is not possible, as the anion itself is probably reduced at potentials of 620-670 mV versus Li, where a... 

Figure 9 shows the first and second cycle of a cyclic voltammogram of a 0.2 molal (molkg ) solution of lithium bis[2,2 biphenyldiolato(2-)-0,C> ]borate in PC at a stainless steel electrode. The sweep covers the potential range from open circuit potential versus a lithium reference electrode up to 4500 mV versus Li and back to E,. The first cycle shows... 

Figure 17.6 Linear correlation of HOMO-energies and anodic oxidation limits of lithium borates Li[B(C6H4.xFx02)2], X = 0 (1) X = 1 (2), and X = 4 (3), Li[B(02C,oH6)2] (4), lithium bis[2,2 -biphenyldiolato(2—)-0,0 ]borate (5), and lithium bis[salicylato(2-)]borate (5).

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