公开(公告)号：CA3016378A1

公开(公告)日：2017-09-14

申请号：CA3016378

申请日：2017-03-07

Applicant: BASF SE

Inventor： WALDMANN DANIEL ,  ROEDER JENS ,  GOEBEL MICHAEL ,  AHLF MARAIKE

IPC: G02F1/155 ,  G02F1/163

Abstract: The invention relates to a process for switching an electrochromic cell (100) comprising at least a first electrode layer (106) and a second electrode layer (108) each capable of reversibly inserting ions. Further the cell (100) comprises an ion-conducting layer (110) that separates the first electrode layer (106) and the second electrode layer (108) and a temperature sensor (216) for measuring a temperature (T) in or on or in the vicinity of the electrochromic cell (100). Moreover, a first contact member (101) is electronically connected with the first electrode layer (106) and a second contact member (102) is electronically connected with the second electrode layer (108), wherein the first (106) and the second electrode layer (108) are counter electrodes to each other. Furthermore, at least said first electrode layer (106) comprises an organic polymer matrix and dispersed within said organic polymer matrix an electrochromic material, electronically conductive nanoobjects (112) and an electrolyte (114) dissolved in a solvent. Further, the process comprises to measure the current (iC) flowing through the cell (100) if a voltage (UC) is applied to the electrode layers (106, 108), and applying a voltage (UC) to contact members (101, 102) and varying the applied voltage (UC) as a function of current (iC), such that the voltage (UC) generated between the electrode layers (106, 108) is kept within predetermined temperature (T) dependent safe redox limits and such that the cell current (iC) is limited to predetermined temperature-dependent limits. Moreover, the applied voltage (UC) is only increased if the cell current (iC) is less than a maximum cell current (imax), determined according to: imax = jmax x Area + (T-T0) x F, where jmax is a predetermined maximum current density, Area is the active cell area, T is the temperature of the electrochromic cell (100) measured with the temperature sensor (216), T0 is a reference temperature, and F a factor. Further, the invention relates to an apparatus (200) and a system (300) for performing the process.

公开(公告)号：CA3014101A1

公开(公告)日：2017-08-17

申请号：CA3014101

申请日：2017-02-07

Applicant: BASF SE

Inventor： GOEBEL MICHAEL ,  ROEDER JENS ,  SEELER FABIAN ,  AHLF MARAIKE ,  NOERENBERG RALF ,  BECK ERICH

IPC: G02F1/15 ,  B82Y40/00 ,  C09D11/38 ,  C09D11/52 ,  C09K9/00

Abstract: Described are electrochromic devices and compositions as well as manufacturing methods for making such electrochromic devices by printing or wet processing of the compositions. The compositions are in the form of a suspension and comprise two or more monomers, nanoparticles of an electrochromic metal oxide, one or more metal salts of the form (M)z(R)y, where M is a metal cation and R is the corresponding salt anion, a carrier liquid and a solvent. The compositions are polymerised to form a composite layer comprising a polymer matrix that hosts the electrochromic nanoparticles and the electrolyte. At least a part of the metal salts (e.g. zinc acetate) is physically adsorbed onto the surface of the nanoparticles and acts as a dispersant.