Towards deriving Ni-rich cathode and oxide-based anode materials from hydroxides by sharing a facile co-precipitation method

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 Ni0.8Co0.1Mn0.1(OH)2. Ni-rich layered oxide of LiNi0.8Co0.1Mn0.1O2 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. LiNi0.8Co0.1Mn0.1O2 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.

Rechargeable Li-ion full batteries based on one-dimensional Li-rich Li1.13Mn0.26Ni0.61O2cathode and nitrogen-doped carbon-coated NiO anode materials

“…The Li-rich LMO@LNO electrode clearly shows smaller polarization during the charge/discharge process, which means that the Li-rich LMO@LNO electrode could have an increased charge transfer rate, compared to the pristine LNO electrode. 46,47 To further demonstrate electrode polarization, EIS measurement was conducted for two electrodes. As shown in Fig.…”

High Performance Nickel Based Electrodes in State-of-the-Art Lithium-Ion Batteries: Morphological Perspectives

“…Even with a unique morphology, the initial lithiation capacity of Li in conversion anodes is still much larger than the de-lithiation capacity. However, efforts to increase the usability of conversion-type materials for Li-ion full cells, such as a Lirich cathode material, material incorporation with carbon, and pre-lithiation of conversion anodes, are still being made (Qiu et al, 2018;Wei et al, 2020).…”

Ni‐Rich Layered Cathode Materials by a Mechanochemical Method for High‐Energy Lithium‐Ion Batteries

“…Therefore, Ni provides high capacity but poor thermal stability and Co offers increased electronic conductivity, resulting in an excellent rate capability and additional capacity derived from the Co 3 + /4 + redox reaction, while Mn maintains excellent cycling performance and safety. [21][22][23] Nowadays, LiNi cathode materials are attractive for use in commercial lithium-ion batteries. However, it should be noted that the capacity of these materials is approximately 150-160 mAh g À 1 , which is lower than the high capacity require-ments for next-generation LIBs for application in long-range electric vehicles with high energy density.…”

“…The three transition metals Ni, Co, and Mn in the LiNi x Co y Mn z O 2 materials play different roles in terms of crystal structure and electrochemical properties. Therefore, Ni provides high capacity but poor thermal stability and Co offers increased electronic conductivity, resulting in an excellent rate capability and additional capacity derived from the Co 3+/4+ redox reaction, while Mn maintains excellent cycling performance and safety [21–23] …”