Towards deriving Ni-rich cathode and oxide-based anode materials from hydroxides by sharing a facile co-precipitation method. Issue 20 (1st May 2018)

• Record Type: Journal Article
• Authors: Qiu, Haifa; Du, Tengfei; Wu, Junfeng; Wang, Yonglong; Liu, Jian; Ye, Shihai; Liu, Sheng
• Is Part Of: Dalton transactions. Volume 47:Issue 20(2018)
• Page Start: 6934
• Page End: 6941
• Publication Date: 2018-05-01
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c8dt00893k
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : A facile co-precipitation method is shared to derive Ni-rich cathode and oxide-based anode materials with remarkable electrochemical performance. Abstract : Although intensive studies have been conducted on layered transition metal oxide(TMO)-based cathode materials and metal oxide-based anode materials for Li-ion batteries, their precursors generally follow different or even complex synthesis routes. To share one route for preparing precursors of the cathode and anode materials, herein, we demonstrate a facile co-precipitation method to fabricate Ni-rich hydroxide precursors of Ni0.8 Co0.1 Mn0.1 (OH)2 . Ni-rich layered oxide of LiNi0.8 Co0.1 Mn0.1 O2 is obtained by lithiation of the precursor in air. An NiO-based anode material is prepared by calcining the precursor or multi-walled carbon nanotubes (MWCNTs) incorporated precursors. The pre-addition of ammonia solution can simplify the co-precipitation procedures and the use of an air atmosphere can also make the heat treatment facile. LiNi0.8 Co0.1 Mn0.1 O2 as the cathode material delivers a reversible capacity of 194 mA h g −1 at 40 mA g −1 and a notable cycling retention of 88.8% after 100 cycles at 200 mA g −1 . This noticeable performance of the cathode arises from a decent particle morphology and high crystallinity of the layered oxides. As the anode material, the MWCNTs-incorporated oxides deliver a much higher reversible capacity of 811.1 mA h g −1 after 200 cycles compared to the pristine oxides without MWCNTs. The improvement on electrochemical performance can be attributed to synergistic effects from MWCNTs incorporation, including reinforced electronic conductivity, rich meso-pores and an alleviated volume effect. This facile and sharing method may offer an integrated and economical approach for commercial production of Ni-rich electrode materials for Li-ion batteries.