Boron-substituted lithium compounds, active electrode materials, batteries and electrochrome devices

摘要

Lithium insertion compound having the following formula (I): Li_alphaM_betaM1_vM2_wM3_xM4_yM5_zB_gamma(XO_4-epsilonZ_epsilon)₁ (I) M is selected from V²⁺, Mn²⁺, Fe²⁺, Co²⁺ and Ni²⁺; M1 is selected from Na⁺ and K⁺; M2 is selected from Mg²⁺, Zn²⁺, Cu²⁺, Ti²⁺, and Ca²⁺; M3 is selected from Al³⁺, Ti³⁺, Cr³⁺, Fe³⁺, Mn³⁺, Ga³⁺, and V³⁺; M4 is selected from Ti⁴⁺, Ge⁴⁺, Sn⁴⁺, V⁴⁺, and Zr⁴⁺; M5 is selected from V⁵⁺, Nb⁵⁺, and Ta⁵⁺; X is an element in oxidation state m, exclusively occupying a tetrahedral site and coordinated by oxygen or a halogen, which is selected from B³⁺, Al³⁺, V⁵⁺, Si⁴⁺, P⁵⁺, S⁶⁺, Ge⁴⁺ and mixtures thereof; Z is a halogen selected from F, Cl, Br and I; the coefficients alpha, beta, v, w, x, y, z, gamma and epsilon are all positive and satisfy the following equations: 0<=alpha<=2 (1) 1<=beta<=2 (2); 0 0<=alpha<=2 (3); 0<=epsilon<=2 (4); alpha+2beta+3gamma+v+2w+3x+4y+5z+m=8-epsilon (5); and $0<\frac{\mathrm{gamma}}{\mathrm{beta}+v+w+x+y+z}<=0.1,$ preferably, $0<\frac{\mathrm{gamma}}{\mathrm{beta}+v+w+x+y+z}<=0.05.$ Methods for preparing these compounds. Active materials of electrodes, in particular of positive electrodes containing said compounds, and batteries and electrochromic devices using these compounds.