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Silicon vs. Graphite: The Micro-War Defining the Future of Battery Performance Under the microscope, silicon and graphite particles act like two athletes with starkly different temperaments, collaborating yet competing fiercely on the charging and discharging stage; the fate of the battery hinges on the outcome of this microscopic gambit. The composite electrode is formed by mechanically blending nano-silicon particles with micron-sized graphite particles, yielding electrochemical performance that is significantly superior to that of single-material batteries.   Silicon boasts a staggering theoretical capacity of 3,579 mAh/g—nearly ten times that of traditional graphite anodes—positioning it as a pivotal material for achieving high-energy-density batteries. By optimizing the competitive interplay between silicon and graphite,

On April 21, 2025, at its Super Technology Day, CATL officially unveiled its “Self-Generated Anode” (SGA) technology. This innovation eliminates the use of traditional materials like graphite as the anode. Instead, by precisely controlling the deposition process of metallic elements (such as Lithium or Sodium), it forms a uniform and dense metallic layer directly on the current collector surface, significantly boosting the battery’s energy density. Through nanoscale interface structural design, the technology optimizes ion conduction paths, ensuring stable metal deposition during charge and discharge cycles while minimizing side reactions and active ion loss. This breakthrough addresses the long-standing challenge of cyclic degradation in lithium-metal anodes. Consequently, the ion conduction rate

Hybrid Pulse Power Characterization (HPPC) is a test designed to characterize the pulse charging and discharging performance of EV batteries. It serves as a critical methodology in battery performance assessment, primarily targeting the performance evaluation and power management of battery systems, modules, and battery cells for hybrid electric vehicles (HEVs). This article focuses on the test principles, methodologies, and practical application cases of HPPC. 1. Definition and Scope of HPPC Test for EV batteries HPPC (Hybrid Pulse Power Characterization) is a characterization test used to demonstrate the pulse charging and discharging performance of traction batteries. The characteristic curve of the HPPC test is shown in Figure 1 (a). Its objective

China battery company Welion achieves 824 Wh/kg energy density in lab, targets 1000 Wh/kg China’s solid-state battery company Welion New Energy Chairman Yu Huigen has revealed a breakthrough in solid-state battery technology, announcing that the company has achieved an industry-leading energy density of 824 watt-hours per kilogram (Wh/kg) in laboratory tests, with future targets exceeding 1000 Wh/kg. Yu stated during a recent TV programme, Dialogue, of Chinese state media CCTV, “Our laboratory tests have demonstrated solid-state batteries with energy densities reaching 824 Wh/kg, and we expect to break the 1000 Wh/kg barrier in the long term” Despite the technical breakthrough, Yu acknowledged that cost factors, particularly expensive raw materials in

Synergistic Coupling of Host and Electrolyte Achieving1270 Wh/L in Anode-Free Lithium Metal Batteries. Anode-Free Battery Doubles Electric Vehicle Driving Range. [POSTECH, KAIST, and Gyeongsang National University achieve a record-breaking energy density of 1,270 Wh/L] Could an electric vehicle travel from Seoul to Busan and back on a single charge? Could drivers stop worrying about battery performance even in winter? A Korean research team has taken a major step toward answering these questions by developing an anode-free lithium metal battery that can deliver nearly double driving range using the same battery volume. A joint research team led by Professor Soojin Park and Dr. Dong-Yeob Han of the Department of Chemistry at

Design, Assembly, and Testing of Full Coin Cells: Tutorials and Case Studies. Let’s start! 1. Introduction A full cell is a complete battery system comprising a cathode, anode, separator, electrolyte, and casing. Unlike half-cells, full cells provide an accurate assessment of the electrochemical and mechanical performance of a battery under actual operating conditions. While a half-cell typically utilizes a metal sheet or foil (such as lithium metal) as the counter electrode, a full cell is composed of two active electrodes—one functioning as the cathode and the other as the anode. The design and assembly of a full cell require the consideration of multiple factors, including the selection of electrode materials,