LaNiO3 as a Novel Anode for Lithium-Ion Batteries

  • Chang Zhang
  • Cong Wu
  • Zhiwei Zhang
  • Yanran Shen
  • Wei LiuEmail author
Open Access
Research Article


Lithium-ion batteries (LIBs) have been developed for over 30 years; however, existing electrode materials cannot satisfy the increasing requirements of high-energy density, stable cycling, and low cost. Here, we present a perovskite-type LaNiO3 oxide (LNO) as a new negative electrode material. LNO was successfully synthesized by a sol–gel method. The microstructure and electrochemical performance of LNO calcined at various temperatures have been systematically investigated. The LNO electrode shows a high rate capability and long cycling stability. In a C-rate test, a specific capacity of 77 mAh/g was exhibited at 6 C. LNO can also deliver a specific capacity of 92 mAh/g after 200 cycles at 1 C. This paper presents a type of binary metal oxide as a new anode material for high-performance LIBs.


Lithium-ion batteries LaNiO3 Sol–gel method Perovskite Electrochemical properties 


Lithium-ion batteries (LIBs), one of the most remarkable energy storage technologies for the past 30 years, have been widely used for portable electronics and power tools and are now making their way into electric vehicles (EVs) and grid storages [1, 2, 3, 4]. Different types of electrode materials have been examined to meet the growing demands of high-energy density and long cycling life for LIBs such as LiFePO4, LiCoO2, LiNi1−xyCoxAlyO2, and LiNi1−xyCoxMnyO2 for cathode materials and graphite, Li4Ti5O12, Si/C, and P for anode materials [4, 5, 6, 7, 8, 9, 10]. However, commercialized graphite anodes show a poor rate capability that limits their application in high C-rate conditions. Moreover, the Li4Ti5O12 anode exhibits a higher charging/discharging platform, which reduces energy density and impedes its large-scale use.

In addition, metal oxides have gained scientists’ attention because of their high specific capacity and have been considered and investigated as alternative anodes in recent years [11, 12, 13]. There are three types of electrode reaction mechanisms: alloying–dealloying, intercalation–deintercalation, and conversion (redox) [14, 15]. Jin et al. [11] studied a high-energy density, high-theoretical capacity anode electrode material that comprised Se-based oxides and had a reaction mechanism based on Li–Se alloys. Han et al. [12] reported a new material of KNb5O13 that relied on the intercalation–deintercalation reaction. This type of transition metal oxides has a multidimensional layer structure that can be the host for Li-ion reversible insertion and extraction without destroying the lattice structure. Zhang et al. [13] developed a new material based on the conversion reaction. The new material, LaCoO3, reveals the new reaction mechanism between LaCoO3 and Li metal. Cabana et al. [14] summarized the conversion reactions of approximately 50 electrode materials, including Cr2O3, Mn2O3, Fe2O3, NiO, CuO, and Co3O4 monometal oxides. In 1981, Thackeray and Coetzer [16] studied Fe2O3 and Fe3O4, and some degrees of cyclic reversibility were observed using molten LiCl/KCl electrolytes at a high temperature. However, these types of metallic oxides were not considered alternative electrode materials for LIBs because of their irreversibility at room temperature. Fortunately, at a later point in time, proof was found that several oxides had stable specific capacities that were as much as three times those of carbon materials [15]. Currently, the concept of “conversion reaction” as a new strategy has been widely accepted. Up to now, most of the researches based on “conversion reaction” electrode materials focused on monometal oxides, and several binary metal oxides such as CoSnO3, NiCo2O4, and CaSnO3 have also been synthesized and investigated [17, 18, 19].

Here, we report a perovskite-type LaNiO3 oxide (LNO) as a new negative electrode for LIBs. LNO was prepared by a sol–gel method. Calcination temperature was studied, and the microstructure and morphology of the samples were systematically characterized. The rate capability and cycling performance of the LNO electrode were also studied.



LNO was prepared via a sol–gel method using lanthanum nitrate, nickel nitrate, and citric acid [20, 21, 22]. First, 0.02 mol lanthanum nitrate hexahydrate (La(NO3)3·6H2O, 99.99%, Aladdin) was dissolved in 40 mL distilled water via magnetic stirring. Then, 0.02 mol nickel nitrate hexahydrate (Ni(NO3)2·6H2O, 99.99%, Aladdin) was added into the solution. After previous ones were completely dissolved, 0.04 mol citric acid monohydrate (C6H8O7·H2O, 99.99%, Aladdin) was added into the solution using a complexing agent. Second, the mixture solution was magnetically stirred and heated with a hotplate (IKA, C-MAG HS 7) at 40 °C for 2 h for the sol formation. The temperature was increased to 120 °C until excess free water evaporated, and then, a brown dry gel was obtained. Subsequently, the temperature was increased to 300 °C and spontaneous ignition occurred, which was named the “Pechini” reaction route. Finally, after slight grinding, the products were calcined at 700 °C and 1100 °C for 8 h in air at a heating rate of 5 °C/min (HF Kejing, KSL-1200X). The products were ground into fine powders for the next step.

Electrode Fabrication

LNO powders, Super P, and polyvinylidene fluoride (PVDF) with a weight ratio of 8:1:1 were mixed and fully ground using a mortar and pestle. The mixture was dispersed in NMP to form slurry, cast-coated onto a copper foil as a current collector, and dried at 80 °C in a vacuum oven overnight. Then, the electrode foil was punched into disks (diameter = 12 mm) as a working electrode in the cell. A lithium foil (diameter = 14 mm) was used as counter/reference electrodes. Celgard 2325 microporous membrane comprising polypropylene/polyethylene/polypropylene (PP/PE/PP) was used as a separator (diameter = 16 mm). Then, the electrolyte was composed of the solution of 1 mol/L LiPF6 in ethylene carbonate (EC) and diethyl carbonate (DEC) with a volume ratio of 1:1. The CR2032 coin cells were assembled in an argon-filled glovebox (Vigor) with O2 and H2O content less than 10−6.


The crystalline phase structure of the products obtained at various temperatures was determined by X-ray diffractometry (XRD, Bruker D8 Advance, Cu Kα radiation) ranged from 10° to 80° at a scan rate of 6°/min. The microstructure and morphology of the samples were examined with scanning electron microscopy (SEM, JEOL JSM-7800F). Electrochemical impedance spectroscopy (EIS) was performed on an electrochemical workstation (Bio-Logic, VMP-300). The applied AC perturbation signal was 10 mV, and the frequency range was from 7 MHz to 0.1 Hz. The cyclic voltammetry (CV) were performed in an electrochemical workstation with a potential range of 0.01–2.0 V at a scan rate of 0.3 mV/s. The galvanostatic charge and discharge (GCD) of these cells were tested between the cutoff voltage of 0.01 V and 2.0 V at room temperature on a LAND CT2001A battery testing system.

Results and Discussion

Figure 1 shows the crystalline phase structure of the ABO3-type LNO. The larger La3+ cation occupies site A, the smaller Ni3+ occupies site B, and the model drawn by the white dashed line represents a unit cell [22]. The XRD patterns of LNO calcined at various temperatures are given in Fig. 2. The XRD patterns of LNO-700 show that several sharp peaks exist at 23.2°, 32.9°, 40.7°, 41.3°, 47.4°, and 58.7°, which belong to the (100), (110), (021), (003), (200), and (122) crystal faces, respectively. These findings reveal that the product is a perovskite-type LaNiO3 (PDF# 34-1028) without related impurity phase. As the calcining temperature increased, the strongest peak of (110) crystal face separates into three peaks, namely (117), (020), and (200). The product that calcined at 1100 °C transformed into an orthorhombic La3Ni4O10 (PDF# 50-0243) [22, 23, 24].
Fig. 1

Crystal structure of the perovskite-type LNO

Fig. 2

XRD patterns of the as-prepared LNO samples calcined at 700 °C and 1100 °C

The micromorphology and electrochemical performance of the LNO powders calcined at various temperatures were studied. Figure 3 shows the SEM images of the LNO samples calcined at 700 °C (LNO-700) and 1100 °C (LNO-1100). As shown in Fig. 3a, b, the average size of the LNO-700 particles is ~ 300 nm. Figure 3c, d exhibits that the particle size grows to ~ 500 nm when the calcination temperature is 1100 °C. Evidently, LNO-700 has a more homogeneous grain diameter and larger specific surface area, which may be among the reasons for its better electrochemical performances.
Fig. 3

SEM images of LNO-700 (a, b) and LNO-1100 (c, d); particle size distribution of e LNO-700 and f LNO-1100

Next, the electrochemical performances of LNO were evaluated. The previous research [13, 20] has proposed the following reaction mechanism for the conversion reaction of LNO
$$2{\text{LaNiO}}_{3} + \, 2{\text{Li }} \to {\text{ Li}}_{2} {\text{O }} + {\text{ La}}_{2} {\text{O}}_{3} + \, 2{\text{NiO}}$$
$${\text{NiO}} + 2{\text{Li}} \rightleftharpoons {\text{Ni }} + {\text{ Li}}_{2} {\text{O}}$$
Accordingly, the theoretical specific capacity of LNO was calculated as 218 mAh/g. Figure 4a shows the CV curves of LNO-700 at a scan rate of 0.3 mV s−1. In the first scanning cycle, the LNO electrode exhibits a large and broad reduction peak, ranging from 0.8 to 0.3 V, and the peak disappears in the next cycling. This can be attributed to the formation of the solid electrolyte interface (SEI) layer and the reduction of Ni3+ to Ni2+ described in Eq. (1), which is verified by the GCD curves shown in Fig. 4b. The first discharging process had a plateau from 0.8 to 0.3 V. From the second scanning of CV in Fig. 4a, there are an oxidation peak at ~ 1.6 V and a reduction peak at ~ 1.0 V, which reveal that it is a reversible reaction, as described in Eq. (2). Moreover, there are corresponding plateaus in the GCD curves.
Fig. 4

Electrochemical performances of Li|LNO-700 half cells between the cutoff voltage of 0.01 V and 2.0 V. a CV curves at a scan rate of 0.3 mV/s and b GCD curves at current density of 20 mA/g

To further study the electrochemical behaviors of the Li|LNO half cells, electrochemical impedance spectroscopy (EIS) measurements were taken before cycling in the frequency range from 7 MHz to 0.1 Hz (Fig. 5a). The inset in Fig. 5a shows the equivalent circuit. As can be seen, the EIS spectra comprise three parts: the intersection with the real axis in the high-frequency region, a semicircle in the middle-frequency region, and a sloped straight line in the low-frequency region. The intersection corresponds to the electrolyte resistance (Rb), and the values of LNO-700 and LNO-1100 are 3.4 Ω and 3.7 Ω, respectively. The semicircle indicates the overlapping of the interfacial resistance (R1) and charge transfer resistance (Rct). The straight line is attributed to the Li-ion Warburg diffusion process in the electrode. Moreover, the Li-ion diffusion coefficient (DLi+) can be calculated using the following equation [25].
$$D = \frac{{R^{2} T^{2} }}{{2n^{4} F^{4} A^{2} c^{2} \sigma^{2} }}$$
$$Z_{{\text{re}}} = R_{{\text{ct}}} + R_{\text{b}} + \sigma \omega^{ - 1/2}$$
where R is the gas constant; T is the absolute temperature; n is the number of the electrons per molecule attending the electronic transfer reaction; F is the Faraday constant; A is the surface area of the LNO electrode; c is the concentration of Li-ion in the electrode; and σ is the Warburg factor that can be obtained from the slope (Fig. 5b) of the linear fitting of the real part of the impedance spectra (Zre) versus the reciprocal square root of the angular frequency (ω−1/2), as shown in Eq. (4). The sloped straight line of LNO-1100 (σ2 = k = 99.3) is considerably steeper than that of LNO-700 (σ1 = k = 28.7). By putting σ1 and σ2 into Eq. (3), we found that D1 = 2.12 × 10−15 cm2/s and D2 = 1.77 × 10−16 cm2/s. Because D1/D2 = 12, the diffusion velocity of Li-ion is faster than that in the LNO-700 electrode system.
Fig. 5

a Nyquist plots, b plots of Z′ versus ω−1/2, c rate capability, and d cycling performances of Li|LNO-700 and Li|LNO-1100 half cells. The inset of a shows the equivalent circuit

Generally, the rate capability decides the power density in the batteries. Therefore, the electrode materials should deliver a higher actual capacity at a high C-rate. As shown in Fig. 5c, the LNO-700 electrode exhibits a specific capacity of 152 mAh/g at 0.5 C, 124 mAh/g at 1 C, 107 mAh/g at 2 C, 89 mAh/g at 4 C, and 77 mAh/g at 6 C. When the C-rate returns to 1 C, the specific capacity is 120 mAh/g. Moreover, the LNO-1100 electrode shows a specific capacity of 76 mAh/g at 0.5 C, 56 mAh/g at 1 C, 44 mAh/g at 2 C, 36 mAh/g at 4 C, 32 mAh/g at 6 C, and 54 mAh/g at 1 C. Evidently, the rate capability of LNO-700 is considerably higher than that of LNO-1100, which is attributed to more uniformly distributed grains and smaller grain size.

The cycling performance of LNO-700 and LNO-1100 at 1 C is displayed in Fig. 5d. Compared with LNO-1100, LNO-700 indicates improved performance. The specific capacity presents a fast decay in the first five cycles and then gradually becomes stable. The reason for this phenomenon can be attributed to the irreversible redox reaction described in Eq. (1) and other side reactions. The cycling performance of the LNO electrodes is stable after 30 cycles with a specific capacity of 122 mAh/g. In addition, LNO-700 can deliver a high specific capacity of 92 mAh/g after 200 cycles at 1 C with a capacity retention of 75.4% compared with that of the 30th cycle. Each cycle has a coulombic efficiency close to 99.8%, indicating a stable discharge/charge cycle.


Here, we report a perovskite-type LaNiO3 as a novel electrode material for LIBs. Perovskite-type LNO was successfully fabricated by a sol–gel method, and LNO powders with different grain diameters were obtained at calcination temperatures of 700 °C and 1100 °C. Surface morphology and crystalline phase structure were measured via SEM and XRD, and the electrochemical performances were systematically investigated via CV, EIS, and GCD. LNO-700 shows a higher specific capacity and rate capability than those of LNO-1100. A high specific capacity of 77 mAh/g was obtained for LNO-700 at a high rate of 6 C. In addition, the LNO-700 anode delivered a high specific capacity of 92 mAh/g after 200 cycles at 1 C.



This work was supported by the National Natural Science Foundations of China (No. 21805185) and ShanghaiTech University Start-Up Funding.


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Authors and Affiliations

  • Chang Zhang
    • 1
  • Cong Wu
    • 1
  • Zhiwei Zhang
    • 1
  • Yanran Shen
    • 1
  • Wei Liu
    • 1
    Email author
  1. 1.School of Physical Science and TechnologyShanghaiTech UniversityShanghaiChina

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