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A Sustainable Solid Electrolyte Interphase for High‐Energy‐Density Lithium Metal Batteries Under Practical Conditions
Author(s) -
Zhang XueQiang,
Li Tao,
Li BoQuan,
Zhang Rui,
Shi Peng,
Yan Chong,
Huang JiaQi,
Zhang Qiang
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201911724
Subject(s) - electrolyte , cathode , anode , materials science , chemical engineering , lithium (medication) , interphase , energy density , battery (electricity) , specific energy , metal , lithium metal , chemistry , metallurgy , electrode , engineering physics , thermodynamics , medicine , power (physics) , physics , biology , engineering , genetics , endocrinology
High‐energy‐density Li metal batteries suffer from a short lifespan under practical conditions, such as limited lithium, high loading cathode, and lean electrolytes, owing to the absence of appropriate solid electrolyte interphase (SEI). Herein, a sustainable SEI was designed rationally by combining fluorinated co‐solvents with sustained‐release additives for practical challenges. The intrinsic uniformity of SEI and the constant supplements of building blocks of SEI jointly afford to sustainable SEI. Specific spatial distributions and abundant heterogeneous grain boundaries of LiF, LiN x O y , and Li 2 O effectively regulate uniformity of Li deposition. In a Li metal battery with an ultrathin Li anode (33 μm), a high‐loading LiNi 0.5 Co 0.2 Mn 0.3 O 2 cathode (4.4 mAh cm −2 ), and lean electrolytes (6.1 g Ah −1 ), 83 % of initial capacity retains after 150 cycles. A pouch cell (3.5 Ah) demonstrated a specific energy of 340 Wh kg −1 for 60 cycles with lean electrolytes (2.3 g Ah −1 ).