Preparation of cryo sample /98 A Cu TEM B Liquid N2 -grid Shutter control Li deposition Cryo TEM holder Li dendrite Plunge freeze under Ar Sample in Electron liquid N. beam Load sample Transfer at Liquid N2 Close shutter -170C Li deposition: working electrode:Cu grid Counter/reference electrode:Li metal Electrolyte:1M LiPF in EC/DEC or 10%FEC in EC/DEC Condition:1 mA cm-2 for 30 min 77 Preparation of cryo sample Li deposition: working electrode: Cu grid Counter/reference electrode: Li metal Electrolyte: 1M LiPF6 in EC/DEC or 10% FEC in EC/DEC Condition: 1 mA cm-2 for 30 min