Grafting Benzenediazonium Tetrafluoroborate onto LiNixCoyMnzO2 Materials Achieves Subzero‐Temperature High‐Capacity Lithium‐Ion Storage via a Diazonium Soft‐Chemistry Method. Issue 6 (17th December 2018)

• Record Type: Journal Article
• Authors: Sun, Zhonghui; Li, Zheng; Gao, Lifang; Zhao, Xin; Han, Dongxue; Gan, Shiyu; Guo, Shaojun; Niu, Li
• Is Part Of: Advanced energy materials. Volume 9:Issue 6(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-12-17
• Subjects: 3 µm sized LiNi0.6Co0.2Mn0.2O2 -- conducting polymer -- diazonium -- lithium‐ion batteries -- low‐temperature performance; Energy harvesting -- Materials -- Periodicals; Energy conversion -- Materials -- Periodicals; Energy storage -- Materials -- Periodicals; Photovoltaics -- Periodicals; Fuel cells -- Periodicals; Thermoelectric materials -- Periodicals; 621.31
• DOI: 10.1002/aenm.201802946
• Languages: English
• ISSNs: 1614-6832

Abstract

Abstract: Subzero‐temperature Li‐ion batteries (LIBs) are highly important for specific energy storage applications. Although the nickel‐rich layered lithium transition metal oxides(LiNi x Co y Mn z O2 ) (LNCM) ( x > 0.5, x + y + z = 1) are promising cathode materials for LIBs, their very slow Li‐ion diffusion is a main hurdle on the way to achieve high‐performance subzero‐temperature LIBs. Here, a class of low‐temperature organic/inorganic hybrid cathode materials for LIBs, prepared by grafting a conducting polymer coating on the surface of 3 µm sized LiNi0.6 Co0.2 Mn0.2 O2 (LNCM‐3) material particles via a greener diazonium soft‐chemistry method is reported. Specifically, LNCM‐3 particles are uniformly coated with a thin polyphenylene film via the spontaneous reaction between LNCM‐3 and C6 H5 N2 + BF4 − . Compared with the uncoated one, the polyphenylene‐coated LNCM‐3 (polyphenylene/LNCM‐3) has shown much improved low‐temperature discharge capacity (≈148 mAh g −1 at 0.1 C, −20 °C), outstanding rate capability (≈105 mAh g −1 at 1 C, −20 °C), and superior low‐temperature long‐term cycling stability (capacity retention is up to 90% at 0.5 C over 1150 cycles). The low‐temperature performance of polyphenylene/LNCM‐3 is the best among the reported state‐of‐the art cathode materials for LIBs. The present strategy opens up a new avenue to construct advanced cathode materials for wider range applications. Abstract : A class of low‐temperature organic/inorganic hybrid cathode materials for Li‐ion batteries is prepared by grafting a conducting polymer coating on the surface of 3 µm sized LiNi0.6 Co0.2 Mn0.2 O2 (LNCM‐3) material particles via a greener diazonium soft‐chemistry method. The polyphenylene‐coated LNCM‐3 (polyphenylene/LNCM‐3) has shown much improved low‐temperature electrochemical performance.