Research on the Technology Innovation Efficiency of China’s Listed New Energy Vehicle Enterprises

Abstract

As a new industry, the healthy development of new energy vehicle industry is of great significance for effectively solving environmental problems and energy crises. The purpose of this study was to analyze the technological innovation process of China’s new energy vehicle enterprises and construct the evaluation index system of technology innovation efficiency of China’s new energy vehicle enterprises and SBM model-based network DEA model from the two aspects of technology research and development stage and achievement transformation stage. The overall technological innovation efficiency and staged efficiency of 16 listed new energy vehicle enterprises in China were measured and combined with the Malmquist Index Model. The technical change and efficiency change of 16 listed new energy vehicle enterprises in China, spanning from 2012 to 2018, were analyzed. The results show that the average overall efficiency of technological innovation of 16 new energy automobile companies is 0.5515, and the standard deviation is 0.2341. It reflects the low overall efficiency of technological innovation of Chinese new energy vehicle enterprises and the uneven development and the huge gap between different enterprises. From 2012 to 2018, the M index is less than 1, and the technical level change (TC) has a greater negative impact on the M index.

The Foreseeable Future of Spent Lithium-Ion Batteries: Advanced Upcycling for Toxic Electrolyte, Cathode, and Anode from Environmental and Technological Perspectives

“…The spent LiCoO 2 after repair regeneration showed electrochemistry characteristic bearing a resemblance to LiCoO 2 in mercantile coin cells (140−155 mAh g −1 ) at 900 °C. 76 Then, lowimpurity solid FePO 4 and Li 2 CO 3 obtained after precipitation were re-prepared as the cathodic active substance LiFePO 4 . Newly manufactured batteries with obtained LiFePO 4 could reach a specific capacity of 135.5 mAh g −1 at 1C and still retained 98.0% of their initial capacity after 400 charges and discharges.…”

“…Batteries manufactured with regenerated LiFePO 4 performed a specific capacity of 144 mAh g –1 when discharging at 0.1 C finally . In addition, Chen et al utilized (NH 4 ) 2 S 2 O 8 reagents, successfully achieving the removal of aluminum foils by a one-step oxidation separation process from invalid Li x FePO 4 cathodes and successfully extracting solid FePO 4 with extremely low impurities and precious metal lithium solution . Then, low-impurity solid FePO 4 and Li 2 CO 3 obtained after precipitation were re-prepared as the cathodic active substance LiFePO 4 .…”

The Perception of Occupational Safety and Health (OSH) Regulation and Innovation Efficiency in the Construction Industry: Evidence from South Korea

“…As illustrated in Table 1, diverse studies on innovation efficiency adopt innovation costs and R&D personnel as inputs, and sales as outputs [36][37][38][39][40][41][42][43][44]. This study captures innovation costs and R&D personnel as inputs, and total sales as the output, as in previous studies (see Figure 5).…”

Strength analysis of the lightweight-designed power battery boxes in electric vehicle

“…The development of new energy electric cars, as a strategic developing sector, shall thus optimize the energy structure and protect the natural environment, which is critical to the overall as well as long-term social and economic development. [1] As one of the core technologies of new energy electric vehicles, power battery box has exerted great influence on the car's performance. The pursuit of lightweight power battery box is urgently needed before the substantial scientific advances in batteries, motors, electronic controls, etc.…”